3.6 Update Crashes Login (502 Timeout

Just updated to 3.6 this morning. Did a bunch of admin housekeeping with no issue. Then I logged out. I then tried to make a purchase and the “Buy” button pushed a 502 Time Out. Tried to log back in and got another 502.

Fortunately this site is on a server with excellent support and the staff had been seeing this issue today. Fortunately I had a daily with WooCommerce 3.5.7, which they rolled back to.

Site is functional, but beware of 3.6. The tech supporter team I talked to says that 3.6 works okay on php ver 7.3, but on 7.2 it is problematic.

Site is hosted on WPEngine.