premier pro beta - object masking

I'm using Premier pro beta version 26.1.1. 

The new masking tool is nice, but it has issues, particularly when I create a mask and track an object, then I want that exact mask to be applied to a different layer (over laying a video only in a specific area) I copy the mask over and it becomes just 1 static shape, it will not maintain the mask tracking/path forward and backwards.

I tried manually masking with the pen tool since it was a simple shape, and even when when I create keyframes for a mask path it will not move, it simply keeps the most recent edit and remains a static unmoving mask.

This essentially makes the feature useless for me.

I have successfully used masks in this way in the regular version of premier pro so I'm thinking it's a bug?

Am I missing something or is this just an issue that needs to be fixed?