Nexus Blitz - Only one walking nexus causing us to lose the game
I know I'm supposed to report this on the PBE boards, but I was somehow unable to create a discussion there. We were quite ahead of the enemy team, but when we hit the 18 minute mark, only OUR nexus started walking which in the end caused us to lose the game.
Their nexus was unkillable whilst ours was running into their base. This has probably been reported on already, but I might as well report it anyways.