Help Screen Turns Gray in Some Forums


I use a Galaxy Tab 2 10.1 GT-P5113. I also use a Logitech Bluetooth keyboard with it.

On some forums (not this one), when I try to type something into a window (field), after the first letter, the screen goes gray, except for the window I typed into. I haven't figured out a way to recover what's on the screen once that happens. So, effectively, I cannot interact with some forums.

Does anyone have any thoughts on why this happens? And how to fix it?