Default After update to sense 6 the lockscreen doesn't work as excpected

Hi 2 all!

Yesterday I received the official sense 6 + android update.
Now my locksreen (pattern) doesn't work as good as with sense 5.5.
The patterns are not recogniced - swyping the pattern causes nochting. I hat to try 2-3 times...
It's really anoying. Before the update everything worked fine.
Edit: I activated the developer options: Show Touch. Swyping my unlock pattern is shown but nothing happens!
Anyone else?

Br Chris