From my recent experience playing 127v127, all of my invasion games seem to end extremely quickly, which is odd since invasion was a long gamemode before the 2.2 patch. I'm assuming there is some sort of glitch with the capture points as its extremely quick to capture any point when you are on attack, I am talking like 5-7 seconds of one guy on the capture point and it caps immediately.
My take is to disable the gamemode until Invasion is in a playable state, at least in the 127vs127 mode.