Not sure if this is intended or a bug.
In era since the recent sod battleground queue patch, if you get a group of ten alliance and another group of ten horde, then have each raid leader queue for warsong gulch at the battlemasters, no game will pop, you just wait in queue forever. We found this out trying to play games for the level 49 bracket. To get around it we had to use the wargame command, but we would prefer to queue normally at battlemasters so we can get rep and honor while playing.
On era before the recent patch if you had 2 groups of ten they would instantly queue into each other. That was good, the current system is bad. I’m not sure if there also needs to be other people outside the raid groups solo queued for this bug to occur.