Mob entity doesn't chase the player

I made a mob entity with geckolib. I already made plenty of hostile mobs be it in this mod or in other mods, but this time, I don't know why, the entity doesn't seem to run towards the player at first. It will do it when attacked, meaning it CAN walk and run, but it stands still even though the "wander around" and the "attack entity of type player" are present. I don't know if this is a bug with Mcreator or something like that so for now I put it in help with modding.