Originally Posted by
Death29
I'm aware you said "don't tell me a workaround" but by the sounds of it you might not have heard of this one.
I watch replays sitting in lobbies all the time, just go to your local files and find the rpl you want to watch. Right click it and press open with, then find your toribash file directory and open it using "ToribashSP" then every time you double click on a replay it'll open in ToribashesSP client and won't boot you from the lobby 
This is the workaround I found to be the most helpful, thanks