Hi,
Hope you are doing well.
I have tested with WooCommerce. There does not seem to be any conflict with WooCommerce. I tried login from the WooCommerce checkout page and it did notify properly.
I also tried logging from account and it worked. I am using WooCommerce 3.5-dev(from github) and WordPress 4.9.7
Will be trying with WPUM in next 1-2 days too.
Thank you
Brajesh