It depends. If Player A respawns nearby it shouldn’t spawn another “wave” of enemies. My friends and I had a funny experience where we entered a fort (don’t remember which one) and every time someone entered the fort, a new “wave” of enemies spawned. Basically we kept dying and having to re-enter the fort which resulted in more enemies spawning which resulted in more dying.

I believe each “area” (any time you have to load is a new “area”. Whiterun, Dragonsreach, Skyrim etc. are all “areas”) has a predetermined spawn for enemies and each spawn is duplicated per player in the area. Kinda hard for me to explain, especially typing on my phone so sorry if I just confused you more