Thanks for reporting we have been looking into the problem but haven’t yet been able to reproduce. However from the logs I have seen, the build below should solve the problem.
If your able to give the build above a go and let us know if it solves the problem. If it doesn’t, please fetch logs from the build (as it includes some extra information).
Steps for fetching the logs are available here; https://support.plex.tv/articles/201573117-android-android-tv-fire-tv-logs/