I have a lockscreen rotation issue:

- landscape - ok
- turning from landscape to portrait with backlight on - ok
- locked in portrait, than wake it with power key:

Effect presents with any theme.
I'm using CSSU-T.
I'm not planning to use any third-party lockscreen like enhanced-lockscreen, qtlockscreen, or qmllockscreen, because the device's limited RAM...

So.. how to fix that?