Stability Issues

I was playing and got to round 111. I placed some sniper monkeys down onto the field and the game began to lag. Next thing I know, my whole screen is black and then the home screen pops up. Basically the game crashed. I love this game but could you guys look into this and check/fix these stability bugs/issues in the game. Its really disappointing getting to round 111 especially since it took an hour and then the game crashes and I had to start a new battle. Thank You!

Maksun987976 about Bloons TD 5