Apart of possible Thunderbolt issue, if you have NVMe, try this:@StefanAM
What OS are you running? Latest Big Sur? I have experienced random freezes when running the stock F11o and the modified F11o you provided. What I experienced is very similar to what some of the Designare folks have been experiencing in the latest stock bios version. These freezes seem to be on the later releases of MacOS. I was on 11.4 when I first experienced the freeze with the stock F11o. Then not long after, I tried your modified version and experienced the same thing. I'm wondering if it is a conflict with the patched thunderbolt firmware I'm running, or if it's a result of something changed in the newest version of MacOS and latest Gigabyte bios. Currently running stock F11m with zero problems. Our hardware is very similar except you're running AR with stock firmware.