Encontre esto en xda, aver si no sirve de algo
SOLVED
It should be said that whenever there is a problem, one should look at one's own backyard first, although it's way easier to put the blame elsewhere. So my post here is just to set the record straight and say that 7.2.0.1 is not the culprit with my wifi issue.
The problem actually came from one of my Tasker's profiles, which is set to turn off Wifi and turn on security whenever I am not near a specific cell (ie at home). When I'm on a call, CM no longer gets the cell id for some reason, and Tasker thinks I'm away and does what it has to do in that context. So I cleared the issue by declaring a variable %ONCALL, and by preventing the profile from turning off Wifi if %ONCALL is true.