We noticed very strange Jira behavior and we can't find the explanation or fix for that.
The issue is that Tempo Account picker field added to Jira work item screen is case sensitive: when you write in that field in lower case the picker does not find Account records, having capital letters. It's even more strange that this happens not for everyone: for some users account picker field works fine, but not for others (even having the same permissions).
We are struggling to find the fix quite a long time so any help or even ideas are really appreciated.