Hello B Jorje. I do not think it is a OS issue.
use Storm Slider but when I just activate the Storm Slider (Left Convenience key) it will still light up and come on. The only way to not have the screen come back on that I have found is to only use the Lock feature on the blackberry.. For example on the Storm it is top left button or you can hit the Lock icon on your application screen.
Does this help?
Verizon Storm 2, Until 4/29 went to "INCREDIBLE"
Verizon Tour (Wife's)
OS: 9550--188.8.131.527/643 (OOAK w/all the fixes)