Project timeline shows all the sprints mixed together and can't set the sprint to the issue using drag & drop in Timeline
Platform Notice: Cloud Only - This article only applies to Atlassian products on the cloud platform.
Summary
The project timeline shows all the sprints mixed together and can't set the sprint to the issue using drag & drop.

Environment
Jira Cloud
Cause
This behaviour is seen when you have a specific sprint with long dates((g: 3, 9 months) that overlap with the other sprint's dates.
Solution
There are two possible workarounds:
Please check the sprint dates which have long dates and adjust the dates. Then, you can set the sprint to the issue using drag & drop in the timeline view. Please refer to the below screen-recording.
In case the dates are intentional, you won't be able to assign issues to the sprint via drag-and-drop. However, you can use the right-click menu to update the sprint.
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