Not asking how to factory reset the RS150B; I already did that. That does not resolve this issue. I also rebooted, shut down, completely unplugged everything for several minutes, removed batteries for several minutes, etc. Numerous times. Also tried the Bluetooth pairing process several times without success.
I suspect I need to completely reset the remote; clear the memory on it or such.
This might be how to recreate this presumed bug too:
• Start the pairing process (remote to white, scan from RS150B, select remote).
• Do NOT select the remote ‘again’ under paired though (e.g. purposely stay in white status).
• Delete/unpair the remote while still in white (not gold) status.
Seems you can never pair the remote again if you make the same mistake as me (e.g. missing the final gold step).
In the video below the RS150B ‘sees’ the remote but it cannot pair with it. Note how the remote (in white pairing mode) flashes every time you try to pair it though. That flash indicates to me the RS150B is trying the handshake with the remote but the remote is refusing.