I’m well aware that in GenP wiki, devs made it clear that some AI features might run into some problems, I imagine that beta tools might go even more broken… But can’t help but wonder if it’s happening only with me. After all, After Effects has a similar rotoscope feature and it works just fine without any AI assistance. Anyone tested the Object Mask tool in beta with success?
Remember that this community provides support only for GenP-related issues and not for in-app functionality or feature errors in Adobe software, and as stated on the Compatibility List, GenP does not support Beta versions since they are experimental, may break at any time, and receive no help or assistance.
With that said, the problems you are experiencing with Object Mask in Premiere Pro Beta are not related to GenP, whether the Beta is patched or not makes no difference, because Object Mask is a native Beta feature whose stability depends entirely on Adobe’s own implementation.
Adobe themselves note in their release thread for these new masking tools that the Beta is only an early look at upcoming workflows and is not intended to reflect general availability performance or polish, and many users on the Adobe Community forums have reported the same errors such as Object not found or masks that only partially work even when using genuine licensed versions, confirming that this is a limitation of the Beta itself and not connected to GenP (see here for starters).
Adobe’s own support page also explains that the first time you use Object Masking, Premiere Pro Beta automatically downloads the required models before the tool becomes usable, and while those models are downloading the feature will be unusable, which means if your firewall or network setup blocks the app then the models will never download and the tool simply will not function (see here for more info). These models are machine learning models that run locally on your computer once installed, not Firefly or Sensei cloud-based services, which means they are available to all Beta testers regardless of subscription status.
This is why After Effects Roto Brush behaves differently, as it does not rely on these separate model downloads, so it often appears more reliable.
In short, the issue lies entirely with Adobe’s Beta software and its model download requirements, not with GenP, and while features that rely on Firefly or Sensei servers are tied to a genuine subscription, local AI tools like Object Mask should work for all Beta testers once the required models have downloaded successfully.