I did this and it fixed it:
Revert to 1.10.1. Restart Computer. Reinstall 1.11. Runs fine now.
I did this and it fixed it:
Revert to 1.10.1. Restart Computer. Reinstall 1.11. Runs fine now.
Can confirm. This seemed to fix the problem!
I did this and it fixed it:
Revert to 1.10.1. Restart Computer. Reinstall 1.11. Runs fine now.
Good news is that it did work. Bad news is that after playing for a while and exiting, steam downloaded another update that was 15.4MB. After that, problem is back.