Continuing issues with the Xfinity Stream App on my Samsung TV

I have a 2020 Samsung QLED TV that is having continuing issues running the Xfinity Stream app. Netflix, Amazon Prime, and Hulu all work perfectly and have a much better User Interface as compared to Xfinity Stream. The Xfinity Stream app continues to stop and start intermittently - especially with recorded programs. The worst case was last weekend where I was watching the final day of the BMW Golf Championship where the recording would play for 20 seconds, stop for 20 seconds, and resume for 20 seconds repeatedly through the end of the show. I also continue to receive the error messages "This Video cannot Be Played" Error: TVAPP:00148, or Error: TVAPP: 00107.

In addition to the playback issues, the fast forward/backward functionality is antiquated compared with other streaming apps. There is no progress window which makes it hard to tell where you are, skip commercials, or move to a specific place in the program. Is the Xfinity Stream Team working on improving the UI so that it's comparable to the cable functionality?  The other issue is that the fast forward function is slow - especially the lightning bold mode that takes minutes to move to the end of the show. I use the Xfinity Fast internet service that provides 500MB+ download and 20MB upload speeds - so my internet connection is not the problem.

I've talked with Samsung and have had my TV checked by the store where I purchased my TV, and they both say that these issues are an Xfinity Stream App problem. Please let me know what your timeline is to resolve these issues.