Synch User Meta with Post Meta

Hi,

I’m using two ACF Fieldgroups:
Field Group 1 has all my needed ACF Fields and the Conditional setting “User Form equal to all”.
Field Group 2 has exactly the same needed ACF Fields and the Conditional setting “Post Type is equal to My_CPT”.

Now I have a registration Form which creates a registrated WP User (+ inkl. the custom ACF Fields from Field Group 1) and a CPT Post of this User.

Now the Problem:
When a User wants update his Profile, I’m running the Actions “Update User Meta” and “Update Post Meta”. While the Update of the Meta Data works fine, the CPT doesn’t get updated. In the attached picture you see an example for one Element in the “Upate Post Meta”-Settings…

Maybe there is a problem in the settings!?
I have spent dozen of hours to get that working and running out of time. So any help is welcome!
Thanks alot!