If you want full desktop integration why are you using sway. Most of the functionality you're talking about requires writing scripts if you used i3 or awesome W

If you want full desktop integration why are you using sway. Most of the functionality you're talking about requires writing scripts if you used i3 or awesome WM on X11 as well so has nothing to do with wayland. Regarding exiting and restarting a wayland session, how do you do it? GDM, the console? It obviously works for most other people so it seems you're encountering a bug related to your hardware or setup so you could file a bug report with the appropriate project (again doesn't really seem like a wayland issue though).