Reporting a possible bug: every now and then, a piece of the workset appears to contain no separate revision. Instead it shows the previously selected revision. Example:
This is the 36th revision shown in a workset: https://gyazo.com/8ae1d9d1ff53cbe2b7c25614d06ddc9b
When I select the 37th revision, I see the same one: https://gyazo.com/f5ca72fafdc8b283f50a51a502053b48
This is the 38th revision in that same workset: https://gyazo.com/9373d47bd1ca0ef97536d1558ce4df94
Now when I select the 37th again, I see that revision: https://gyazo.com/29ef4a9885d65f6df8be0b47c63f7d0e
I mark these seemingly empty revisions as 'Unsure?'.