Nexus Blitz... Great Game

I have played a few games of Nexus Blitz and in my opinion, it is the perfect game to kill time while still not passing the 20min mark. However, there are 2 problems. 1.) I dont know if its just me, but I have been lagging a lot on Nexus Blitz. My fps sticks at around 10-12 during games and is more or less impossible to play in. 2.) Sudden Death Glitch/Bug: There has been a time where the enemy team or our team's mobile nexus does not spawn which makes the game unwinnable for someone's team. Has anyone else encountered this problem?