There is frequent beta app updates. at least 1 or more every week at times.
I have other devices that are not using your modded app.
There have been at least 2 new beta app since your version of 12.13.506
beta 12.23.1959
beta (current) 12.27.559
if u have another Android tv device to make use of, install the official beta on that and just use the check for update version.