I'm on Windows 10 x64, problem?(small irritation) occurs in v2.43 and v2.45(possibly earlier).

So the thing is, in Tixati tooltips stays on way longer than in other apps, and secondly tooltips are clickable. If you fast enough you can click tooltip and main Tixati window looses focus(visible on Titlebar).
It only causes little annoyance when switching categories.
It can be expected behavior, but I think it deserve a tweak to tooltip disappearing delay.

Also the option has already been suggested to Disable Tooltips( https://forum.tixati.com/support/480/  ).

Mouseover should remove tooltips.. That is i mouseover without click and they disappear immediately.

Yeah, I got it, seems like problem isn't Tixati related. I managed to click on tooltip in Notepad++ and Windows Explorer. Both of them showed swift focus loss. But some apps like Firefox and Sumatra don't exhibit this kind of behavior. Suggestion about disabling tooltips are still valid.

Agreed: +1 REQ for turn off tooltips.
We can turn off balloon notification for tray icon.