Sometimes I can't open the notifications panel

status bar can´t be sometimes scrolled down

Or GUI hangs up,…

Fix is rebooting the phone.

Since nobody else described this issue before I moved your post out of the “known bugs” topic.
Did I understand you correctly that you try to reach the notification panel and sometimes it doesn’t work? If not please change the title accordingly. Also I assume you are talking about the FP2, please correct me if I’m wrong.

Could be the same as either of the topics below (first = random, second = while charging):

Yes I´m on the FP2 1.26RC and have this issue
Before selfcompiled prerooted Rom was ok.