I had a new bug/error burn me. Gauntlet level D. Easy wins for me.
Select team
Hit button to start battle.
loading screen...
Gauntlet appears, coin flips-AI wins characters still falling to the platform
loading screen...
Gauntlet appears, coin flips-I win-characters fall and I easily win the battle.

I didn't do anything the first time it loaded, and I wasn't taken back to the selection screen. It simply restarted all by itself before the characters hit the platform and reloaded the gauntlet screen with the exact same characters.
After I won the battle I got a weird GTLTMS03 error once before I could start the next battle. I clicked ok on the error and checked my win screen. 100% wins so I figure I'm ok. Force quit and check again. Still 100% wins so I do 3-4 more gauntlet wins. Go to bed and get up this morning to find a loss showing.
I did not lose anything, I did not have to end a battle because of an error. Also my used eddie count is the same as my win count. How the hell did I get charged a loss if I have won with every eddie that is locked?
I've put in a ticket, but I'm pretty peeved to have a loss at level D.
The fact that my used eddie count matches the number of wins I have should be proof enough that the error is on their side this time...