Interesting find. Though i have my characters usage of the loot a rang spaced out a bit: after 10 spellcasts toon 1 tries to loot, 10 more toon 2 tries to loot etc. This way there is less issues of one potensially getting stuck. Every mob that i kill drops something btw. Also, jumping doesnt fix my stuck actionbars. I have to log out and back in on the affected toon.