Broken design of boards grouped by epic in Firefox
Summary
The list titles get stuck when scrolling downwards in a board grouped by epic on Firefox (87.0).
It works flawlessly on Chrome or without grouped epics.
Steps to reproduce
- In an up to date Firefox, show a board and group it by epic. Scroll down until the title bar with list titles disappears.
- Scroll back up, the title bar is hanging in the middle.
- Scroll upwards to the top, the usual place for the title bar is left empty
Example Project
Works with the first board tried on gitlab.com :
https://gitlab.com/gitlab-org/gitlab/-/boards?group_by=epic
What is the current bug behavior?
The title bar does not show up in the correct place.
What is the expected correct behavior?
The title bar should appear at the top and not in the middle of the page
Relevant logs and/or screenshots
Output of checks
This bug happens on GitLab.com (see screenshot above)