Action bars become non interactive after an hour of game play.

[WOWBOX40]

I'm still getting them regularly, have you changed anything before you noticed they stopped happening

The only change i have done: im pressing the buttons more rarely. Instead of mashing them up to several times a second at short periodes, then having a longer break: i now press like every 2 ++ seconds. Its a relaxing pace that suits me. I get less loot, since i kill less mobs, but this is the only way my body is able to cope pressing the buttons reguarly to avoid fatique / pain.