New Object mask tracking in Premiere Pro Beta 25.6.102 no longer working for me

Up to now object tracking has been working very well. Now it seems with this build it no longer tracks. I am working with some people preforming a concert reading on stage and in the past I could select the people as an object and it would track them through the whole clip. Now it just does not track well at all. I am using nested multi camera clips. If you select a person to apply an object mask convert that mask to an opacity mask then track it. It will either blow up really big or just devlove into nothing. Seems to still work if you go directly to the source clip but not in the multi camera nested clips. It was working before just great. I have attached some screen shots so you can see the intial mask then what it does as you step through the tracking.