Hi tattsok,
Players will receive a loss if they quit during a Match Play or Match Play Challenge game. These are competitive modes where wins and losses are tallied, so bailing on your opponent 3 times during the same round will automatically forfeit the game giving the win to the other player.
Stroke play is a non-competitive format in group play right now. There are no wins or losses tallied. Stroke play is only the player against the course in an attempt to better their own personal stats and scoring average. If someone disconnects from your stroke play group game it will not affect your stats in any way and you'll be able to finish out the round on your own (or with the rest of your playing partners) so your efforts are not wasted.