When Tooltip is being rendered as below:
Th-
-is
-a-
to-
-ol
-t-
-ip
it causes minecraft to not respond. Tooltip should be rendered on the left side of the mouse pointer, but it didn't.

Ah, i forgot to mention that you can reproduce it by hovering on version button in direct connection screen with multiconnect

Are you using the latest release of tooltip fix? I'll investigate tomorrow

I redownloaded whole game and now it works as it should.