Using the Learning Remote Feature bypasses the CEC settings of the box. There is a software issue with the Android 9 in the XRS4900, I see it on multiple units.
The CEC will turn off the Samsung but not back on. The Android 11 on the other boxes works because there is a separate setting for TV off ,TV on.
I have notified Buzz concerning this issue.
When you use the BT-200 or BT-250 and program the codes or learn the codes of the TV, CEC does not work since the remote has sent a signal to the TV to Turn Off or On.