I found a doozy. Have a look at this. You can click the pic for a non-cutoff version.
Let me see if I can explain this because it's weird. First off, I loaded up the client and selected "JOIN GROUP". I was placed into a group, however, I was placed into the first position (host position). When I joined the lobby the 3 other players spots were already "Searching for Player...". I clicked Cancel and backed out. I again click "JOIN GROUP" and was joined to the lobby in the 2nd player position (not host). However, in the 2nd player position I was the one that had to "TEE OFF" to get the game started. Very strange. We loaded fine, played down the first hole fine and then while I'm about to make my putt I get that on-screen error.
In case it's too small to see it reads: "GAME CANCELLED: Your multiplayer game was cancelled due to inactivity. Please create another game and be sure to tee off within 5 minutes after the first person joins your game."
Now the problem here is that as soon as I click OK, it goes to the blue screen, almost like it's loading a new location or something. Once it goes to blue screen the only way out is to close the window completely. I do not have the ability to click on anything but the OK button. So I can' take my shot, chat with my competitors or anything else. I did not try to host a game, therefore I shouldn't even be seeing this error.
I'm pretty sure the problem is in the multiplayer lobby's queue. Somehow when folks are cancelling games or starting games they aren't being cleared out of the queue. I've had situations where I'll be in a lobby with 4 people (myself included) yet I see 5 people talking and everyone sees each other in a different position. I've also been in situations where the player in the host position was not actually there. They showed there, but upon asking that person later "why didn't you start" they say they weren't in the lobby starting a game in the first place.
I hope that makes some sort of sense.