DC before 2 min

I've had this problem ever since the current patch update where no matter what mode I play (Draft, ARAM, etc.), my client will randomly DC before the two minute mark. I've had this happen during the load screen as well as in game. The funny thing is, once it happens, it won't happen again. I've had only one game since the patch where it didn't happen at all. It always happens before the 2 min mark (basically before minions spawn) and it only happens once.

I play on a Mac. My ping is a consistent 27ms. No frame rate issues or anything like that. No ticks in the gameplay. Can't think of anything that would be causing this in my hardware. Wanted to know if anyone had any thoughts.