Expand arrow doesn't expand

[ocdtrekkie]

I'm on Firefox, and when I click the down arrow on a given repo, it doesn't expand, but when I click somewhere in the whitespace around the repo, it does. If I spam-click the expand arrow, it seems to work... sometimes, but partially because it's highlighted some other text?

Basically, even when the expand arrow for a repo is highlighted purple because my cursor is over it, when I click, it rarely actually expands for some reason.

[lourot]

Thanks for the bug report! Indeed I also observe such an issue on Firefox 60.0.2 on Linux. For me, the arrows work for a while, but seem to stop working at some point, until I move to another window and come back to Firefox, then it works again for a while.