Yes, that's one of my most stubborn issues. My difficulty swallowing comes and goes in intensity, but never completely clears up. Can be very scary at times. Eating and drinking when you're at your peak of strength helps a little, but I've never found a way to control saliva production, and sometimes it just catches you off guard.

Dysphasia is a symptom of mg and Lems, but you probably need to have other things ruled out in case it's from some other cause.