ScreenPersonas - Tab Merging

We just got ScreenPersonas with plans to do a lot of tab merging. We use a module called global trade management (GTM) - specifically transactions WB21/WB22 (not to be confused with GTS)

When I try to merge tabs on WB21 - the system fails to cache the tabs - so merging is impossible. I believe this is caused by validations that run when you focus on a few of the tabs.

I'm working with my implementation partner to look at removing the validations - but I wanted to see if anyone else had a similar experience or if there is a best practice for using ScreenPersonas on transactions that have validation checks on tabs before i get them started.