User Names not syncing on MemberPress site

[seu-steve]

We're using MemberPress on 6 sites and consolidating all members onto one site using WPRUS.

User creation works great. Also, when a member updates their profile through the account page email address and custom meta data get synced correctly. But First Name and Last Name do not sync as expected. They do get synced, though, if the user updates their email address later.

Has anyone else noticed this behaviour and found a resolution for it?

[seu-steve]

I do understand that only Ultimate Membership is a supported membership plugin.

MemberPress Tech Support claims that they "rely on WordPress user metadata and manipulate users with the WordPress user functions" to process name changes, so I'd expect WPRUS to sync name changes without issue.