Even after you remove the GM.AFR PID, just to be on the safe side please also remove the two PIDs: GM.IBPW1 and GM.IBPW2.
I have a theory that the PIDs are not being validated correctly. Some PIDs that are not valid appear to be validated by the PCM as supported. Howeever, I think the ECM may be reporting them as supported for CARB/Freeze frame data but not for high speed logging.
I may need to change the way EFILive detects valid PIDs. We had a similar issue on the latest duramax diesels as well.
Regards
Paul