Yes. The crash was occurring when it wasn't being bypassed. The temporary fix from Asus will now always bypass it.
Thanks for confirming the test results.
Slightly related to this, and while you have the engineers on the line about fc...
Flow cache on the AX86U has caused major issues with QoS (believe stock and with Merlin Addons) for a while now. Some of the original classification bugs appear to have been worked out, but fc actually throttles download speed.
This is reproduceable by enabling QoS, and then comparing *not router-run* speedtests with fc enabled and disabled. Router-run speedtests aren't impacted.