Character moving on it's own while performing an action.

Hello. A couple days ago an issue began to occur and I'm curious if anyone else has had this happen. I play on PS4 and at random times when I hold down R2 to perform an action, (cast a spell, ect.) my character pulls to the left and it reoccurs over a few seconds interrupting whatever action I'm trying to perform. I'm not sure if it's a controller issue because it works fine in every other game. Also, it seems to only happen in dungeon groups. Doesn't seem to happen solo. Thanks for any info.