Somebody somewhere (Chrome update or Amazon fiddling with mTurk yet again) did something that seems to be causing Turk Master to have issues.
Chrome says Aw snap, ran out of memory on the tab where TM is running.
Turned off "Automatic tab discarding" in chrome://flags/ and the crashes stopped but after awhile memory from that tab alone bloated to over 4 gigs in Task Manager over the course of 20-30 minutes.
Closed the tab and all that memory was instantly freed up.
It's worked great for months but for some reason today it's done nothing but crash after a few minutes of running.