Same issue on our switch. Workaround: Create new Switch user profiles linked to separate Nintendo child accounts in a Family Group. Using these profiles allows Player 3 to remain connected. Existing Switch users linked to the same Nintendo Account still exhibit the bug.
JB
Same issue on our switch. Workaround: Create new Switch user profiles linked to separate Nintendo child accounts in a Family Group. Using these profiles allows Player 3 to remain connected. Existing Switch users linked to the same Nintendo Account still exhibit the bug.