Website crash after updating to 3.33 – Site Down

Just updated from 3.32, to 3.33. After update, immediate crash, which disabled entire website.
Traced plugin crash down to this plugin, but apparently this is creating a massive resource crash, and the entire website consumed shared hosting resources and entire website crashed. Had a hard time even tracking this down, as the plugin was updated during shift change.
I started disabling the 4 updates done that day, and isolated it to phone orders pro, v3.33 update.
Need some assistance if possible, tracking down the gremlin, or, if I can backdate to v3.32 if possible. Can give further details on this issue.
Wordpress v5.1.1
Woocommerce v3.5.6

Plugin disabled for now, pending any assistance, or, will revert back to 3.32 if possible.
Currently, only 35 products active on website as we are migrating old website to wordpress/woo. Using custom themes, yoast and numerous other plugins, so not sure if this is a plugin issue, or a compatibility problem.

The page I need help with: [log in to see the link]