I am (1x out of 10) having an issue that when I swipe up to wake the device only the bottom 20% of the 'desktop' screen shows (like curtain only pulled 20% up) and stalls there for 3 seconds and blacks out (screen turns off). Then I swipe up a second time and it unlocks the device and shows my icons desktop as usual.
Last night I did a device reload and recovered only my settings and contacts. The device still has the issue sporadically.
I'm thinking an OS bug and will eventually be fixed.
Try disabling advanced interactions. I think it defaults to "flip to save battery". Try turning that off and disable anything else that may be activated.
Via CB10. PassportSQW100-1/10.3.0.1418 for now...and proud member of the Peevishlicious Crew