Is it the same type of soreness you would get when you first started playing the bass you’re comfortable with now?That’s very interesting. My precision is wide and flat too. I don’t power through any kind of pain it’s usually soreness around bed time and nothing too crazy. I like that it is different as GrapeBass mentioned. Some discomfort may be a part of adjusting I guess.
Playing til you’re tired and muscle sore is one thing, you have to move more on a wider neck, but even mild tendon soreness isn’t something to get used to if you can avoid it.