I’d love to know the answer to this too! I don’t know if having played guitar a certain way for over 2 decades makes it worse or not, but when I try learning a new movement I quickly see the old habits creeping back in. Usually I don’t notice this by feel either, it will happen when I look at my pick hand to double check. Or in the case of mechanic drivers, if I’m working on a wrist movement and going fast, before I know it my elbow starts helping out again. Honestly I’ve struggled with this my whole career. The more I learn about myself, the more I chalk it up to me having horrible sensory perception.
Sorry for the rant, that hits really close to home with me though. I think you should make a thread with this exact question because while it’s related to this topic, others might struggle with it too. I’d just advise some due diligence (on both of our parts - I’ll help since I’m interested) and make sure this hasn’t been addressed already. The forum has a really great search function…time to think of some key terms that would aid.
Lastly, I’ve heard in many of Troy’s videos as well as forum posts that learning a new motion is sometimes best aided by changing a variety of factors such as pick grip, motion mechanic, pick type/thickness etc. Changing more factors I think helps us lock into what exactly feels different about the new thing we’re working on.