hecatae
7
There's been issues with the broadcom implementation for a few years, post above has links to the proprietary brcmfmac4366-pcie.bin wireless driver.
gr0 was disabled at kernel level with 22.03rc6:
https://git.openwrt.org/?p=openwrt/openwrt.git;a=commitdiff;h=5359a8ca382f473e2f671f6ed6f22e9d811c80cf
lastly irqbalance is recommended, and there's a tweaked regdb somewhere