ASUS RT-AC87U keeps crashing

After upgrading my desktop and NAS, it seems my router randomly crashes. For some reason it happens a lot when doing SSH and trying to display a big output like given the command dmesg. This never happened before and I'm unable to find the cause of these weird issue. It seems something is causing an overflow and it makes my network incredible slow/unresponsive. The only fix is to restart the router, but after opening another SSH connection, the problem starts over again.

So far I...

ASUS RT-AC87U keeps crashing