Frontier Defense freezes upon landing on map.

I am having issues playing Frontier Defense.  I pick what I want to play, I get to the screens where you pick your Titan.  It then goes to the jump screen and the pilots jump.  Then once I land on the map, my player freezes.  Can't move or do anything,  I can hear what sounds like people playing but I have to exit the game.  This first happened last Saturday or Sunday. Thanks.