To reproduce:
open the bugtracker on any project/filter.
hever over the bug list scrollbar.
❌ the resize cursor is displayed on most of the width of the scrollbar.
Try to use it.
❌ You can't.
This is specially an issue with users without a mouse, as build-in touchpads don't have a scrollbar, and arrow keys only work when first having clicked in the window, which you ussually don't want to do as it results in the page being changed.
I can't upload any screenshots as theydon't show my cursor and thus are useless
The resize cursor seems to work fine for me.
Mojira is built on a platform called Jira and these fixes cannot be resolved by us but by the software developers. I'll close this bug as there is nothing that Mojang can do to fix it, but if you'd like to have a bug similar to this fixed I suggest you report it directly to Atlassian and the Jira team here. Thanks!