Without more details, I would guess these are graphics driver bugs on the device. That's usually the cause of display glitches. If it was Construct itself doing something wrong, then generally that would look wrong on all devices, as it runs identical code on all platforms; if something is only broken on one kind of device, that usually means a problem with that device.
Using the R250 version of C3 and changing the operating mode to c2 will not cause this problem, so it should not be a device problem. I have tested many devices for this problem and it is almost certain.