Trello - degraded performance
Incident Lifecycle
Incident Timeline
Monitoring
Users should be experiencing restored functionality to their boards and cards.
Our team has resolved 'card not found' errors, and continues to remediate potential outstanding data issues that occurred on Boards and Cards during the incident:
- Missing card labels
- Attachment restrictions not being enforced on moved cards
- Checklist assignees that are not a member of the current board may incorrectly linger
- Card assignees that are not a member of the current board may have incorrectly rec...
Our team has resolved 'card not found' errors, and continues to remediate potential outstanding data issues that occurred on Boards and Cards during the incident:
- Missing card labels
- Attachment restrictions not being enforced on moved cards
- Checklist assignees that are not a member of the current board may incorrectly linger
- Card assignees that are not a member of the current board may have incorrectly rec...
May 22, 2026 at 7:51 PM UTC
Monitoring
The team continues to remediate potential outstanding data issues that occurred on Boards and Cards during the incident (details are in yesterday's update).
Users should be experiencing restored functionality to their boards and cards. Please note that while cards are safe to edit, they may be excluded from certain restoration work if they are edited.
We greatly appreciate your patience as we work through these issues. Please reach out to our support team if you need further assistance.
Users should be experiencing restored functionality to their boards and cards. Please note that while cards are safe to edit, they may be excluded from certain restoration work if they are edited.
We greatly appreciate your patience as we work through these issues. Please reach out to our support team if you need further assistance.
May 21, 2026 at 9:29 PM UTC
Monitoring
Users should be experiencing restored functionality to their boards and cards.
The team continues to remediate potential outstanding data issues that occurred on Boards and Cards during the incident. Below is a list of remaining issues that may still be occurring, but we are currently working to resolve via processing on our end. These issues were caused by card moves between boards during the incident.
- Missing card labels
- Attachment restrictions not being enforced on moved cards
- Check...
The team continues to remediate potential outstanding data issues that occurred on Boards and Cards during the incident. Below is a list of remaining issues that may still be occurring, but we are currently working to resolve via processing on our end. These issues were caused by card moves between boards during the incident.
- Missing card labels
- Attachment restrictions not being enforced on moved cards
- Check...
May 20, 2026 at 7:06 PM UTC
Monitoring
Users should be experiencing restored functionality to their boards and cards.
We are running scripts to replay actions that occurred during the incident. We will update once these are complete.
We are running scripts to replay actions that occurred during the incident. We will update once these are complete.
May 19, 2026 at 6:01 PM UTC
Monitoring
Index rebuild is complete and functionality should be restored for users. We are aware that cards moved by users during the incident may be in an incomplete state and we are investigating solutions.
We have no indication of data loss during the incident. We will continue to monitor and will provide the next updates in 4 hours or sooner.
We have no indication of data loss during the incident. We will continue to monitor and will provide the next updates in 4 hours or sooner.
May 19, 2026 at 2:26 PM UTC
Identified
We are continuing to monitor the index rebuild process across all affected shards and will provide updates as each phase completes. We will provide next update in eight hours or sooner as we make progress.
May 19, 2026 at 7:03 AM UTC
Identified
We want to provide more transparency regarding this incident given its duration.
We were optimizing one of our largest databases, specifically the one storing comments and card activity. At the end of this process, a bug caused some database partitions to go live without their indexes. This means queries to those partitions are timing out, which is why approximately 40 percent of boards are experiencing failures.
Your data is safe. Any comments added during this incident are being saved and...
We were optimizing one of our largest databases, specifically the one storing comments and card activity. At the end of this process, a bug caused some database partitions to go live without their indexes. This means queries to those partitions are timing out, which is why approximately 40 percent of boards are experiencing failures.
Your data is safe. Any comments added during this incident are being saved and...
May 18, 2026 at 10:45 PM UTC
Identified
Our teams continue to work diligently on the mitigation.
During this time, we recommend that you do not move or copy cards or lists between boards. For users whose boards are affected by this issue, you may create and delete cards and edit card descriptions as usual, but you will not be able to see comments or the detailed activity log of the cards.
We estimate that the rebuild will take another 24 hours to complete. We will update this page as we have more information.
During this time, we recommend that you do not move or copy cards or lists between boards. For users whose boards are affected by this issue, you may create and delete cards and edit card descriptions as usual, but you will not be able to see comments or the detailed activity log of the cards.
We estimate that the rebuild will take another 24 hours to complete. We will update this page as we have more information.
May 18, 2026 at 6:09 PM UTC
Identified
Trello continues to experience slowdowns and failures that are affecting comment operations, including creating and deleting comments.
Our teams continue to work on the issue resolution, while it is taking longer than expected. We will provide more updates within the next 8 hours or sooner once we have further information to share.
Our teams continue to work on the issue resolution, while it is taking longer than expected. We will provide more updates within the next 8 hours or sooner once we have further information to share.
May 18, 2026 at 10:14 AM UTC
Identified
Trello is experiencing slowdowns and failures affecting comment operations, including creating and deleting comments. Users may also experience delays when loading activity views on cards, viewing attachments, using Power-Ups, exporting boards and 'Updates' on home page.
Our team is actively working on the resolution and will likely take up to 7 hours to restore the services back to full functionality. We will provide further update at this time, or earlier if we have additional information...
Our team is actively working on the resolution and will likely take up to 7 hours to restore the services back to full functionality. We will provide further update at this time, or earlier if we have additional information...
May 18, 2026 at 3:51 AM UTC
Identified
Trello is experiencing slowdowns and failures affecting comment operations, including creating and deleting comments. Users may also experience delays when loading activity views on cards, viewing attachments, using Power-Ups, or exporting boards. Some users are encountering errors when viewing specific cards.
The team is working hard to restore full functionality and will provide another update within 3h.
The team is working hard to restore full functionality and will provide another update within 3h.
May 18, 2026 at 12:53 AM UTC
Identified
Work by the Trello engineering team continues to restore functionality to comments and activity views. Recovery of the affected systems is taking longer than anticipated.
Next update will be posted within 4h or on a significant change. Thank you for your patience.
Next update will be posted within 4h or on a significant change. Thank you for your patience.
May 17, 2026 at 9:03 PM UTC
Identified
Work by the Trello engineering team continues to restore functionality to comments and activity views.
Next update will be posted within 4h or on a significant change. Thank you for your patience.
Next update will be posted within 4h or on a significant change. Thank you for your patience.
May 17, 2026 at 4:25 PM UTC
Identified
The team has identified the root cause and is hard at working resolving this issue. Users will see problems creating/updating/deleting comments and loading the activity view for cards at this time. The rest of Trello's features should be working as normal.
We will provide more updates within 2h.
We will provide more updates within 2h.
May 17, 2026 at 3:13 PM UTC
Investigating
Users may be experiencing slowdowns across various functions of Trello including creating/deleting comments, editing cards, or creating new attachments. The team is actively working to fix the issue and will provide more updates within the hour.
May 17, 2026 at 2:11 PM UTC
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