Ever since I installed the new 11.5 Catalyst and Vision Engine, Spiral Knights has been acting weird. Very frequently I get skipping/screen lag. During these lag instances, whatever input that is being pressed, is continually pressed, leading to moving a large distance, or having something typed come out with multiple of the same letter.
I uninstalled AMD stuff and the game ran fine on the leftover driver files, but after removal and a clean install of 11.5 the problem was still there.