[Jakov_the_Jakovasaur]

unless you show more code this is basically like having to find a needle in a haystack while blindfolded

you did say you were using a clientside player class previously, i remember a problem in the past where classes which were no longer joined to the player clientside were somehow still stuck to the player, it might be worth debugging whatever that class was and if its somehow still doing stuff, try removing it with player.leave("class");