Ipv6 crashing/rebooting beryl ax

i have a beryl ax as my travel router running tailscale via an exit node i have back home (rpi5). my home internet speed ranges from 300-450mbps download / 20mbps upload

however, when running the exit node, the download speeds on my beryl ax are pretty slow; 8-10mbps.

so i logged into the interface on the beryl ax and turned ipv6 on which immediately bumped my speeds up to 20mbps, as it should be [with my 20mbps upload speed back home]

only thing is, the beryl will crash after a certain amount of time, within 20 mins of running on ipv6. why is that? temps are fine, i don’t think the cpu/memory are being maxed out, so what could it be?

When the router crashes, does the router lose its response?
Can ping 192.168.8.1 (or router LAN IP) on a connected PC? Can SSH be connected to?

It should have nothing to do with ipv6.
How about if disable the ipv6?
If enable the ipv6 and there is a crash, please PM me the syslog to check.