Edit: I seem to have found the solution. Settings -> time taken for tooltip appearance - set to 0,5s. Probably it got reset for everyone or something because I remember my settings always said 0,5s but now it's 0 by default.
It doesn't fix the problem completely, but makes your life a bit easier.
This post has been edited by Seguchi-sama - May 01, 2015, 14:05:23.