I noticed a few threads about people having issues, especially with Luma Ultra, since OS 3.5 release. INAIR is aware of the issues and they have a track record of being very quick to respond to and fix issues.
I have had my POD since last November and I am blown away by how quickly they fix issues and have added functionality to POD. They have added 3dof functionality to XReal Air series, RayNeo Air series, Viture XR Pro, and Viture Luma series (6dof for Luma Ultra) all within a very short time-frame. They intend to have 3dof functionality for XReal One series within a few weeks and Viture Beast next month. The Viture Luma Ultra fix for the restart issue is also coming next month.
Joining their Discord is the quickest way to report issues and get help. See the link below:
I’m not affiliated with INAIR btw except for being a customer and a member of their Pioneer program.