I know this sounds like an odd problem but i am currently unable to jump. I removed all possible buffs relaoded my ui even rebound the key but alas I am unable to jump at all in game. help
if you take the speed king buff, and zone into HoF and die, it seems to bug jump....not sure if that's your problem but it was for me. I went back to DW, grabbed speed king buff, clicked it off, logged off and back on and it works now.