Fly Machines does not follow an straight course

I was trying to do a fly machine on my sugar cane farm and the fly machine just doesn´t follow a straight course, its just like moving back and forward till i stop it, idk if its a bug or a thing that is already nerfed in past versions of the beta but i didn´t know about it. I'll be happy to know if its a mistake from the game or it was already nerfed.