So, I just went in for a software update and as a result, tuning through the OBD is now locked. My tuner managed to do a Bench Flash by removing the ECU, so I'm all good!
This is just warning for all you out there who run a remap, it looks like any new update may lock out remapping through the OBD. This was only an issue for M Performance vehicles for a while but now it looks like the new updates are affecting everyone.
Update: If you're good with someone at the dealer, let them know you're tuned, updated versions of BMW's software now automatically sends data if it finds that you have modified software.
Source:
https://f87.bimmerpost.com/forums/sh....php?t=1760825