its been really weird. ever since i tried to learn this one song with a strumming pattern of

down, down, down, up, down, up, up, down, down, up, down

i cant seem to stop doing that on every single song i play. its not like im trying to its just my arm just naturally moves like that. the problem is on some songs that just sounds awful compared to the original recording. ive tried practicing other strumming patterns but they all seem like i have to force my hand into playing it

is there any easy way to solve this and have you ever heard of something like this happening before
try just doing the regular D,U,D,U,D,U,D,U to a count of 1 and 2 and 3 and 4 and per measure and engrave that, then maybe try a new strum pattern and maybe you wont be stuck on just that one pattern