For the record, I had the exact same experience with having to create my own config when using a GPIO IR receiver. I’m asking about it here:
If the bundled .conf is meant for this use case, then it appears to not work. In that thread I link to a user submitted .conf from LIRC - Linux Infrared Remote Control that also seems to indicate that there might be a problem with the xbox-lircd.conf shipped with OSMC.