Cisco AnyConnect - Disconnects and Reconnects every 20 minutes

[bwalkco]

Hello,

Netgate SG3100
Cisco SG200
Unifi APs

For some reason, my Cisco AnyConnect VPN client (used to connect back to work from home) disconnects and reconnects every 20 minutes. I followed the guide here (https://www.netgate.com/docs/pfsense/vpn/using-cisco-vpn-pass-through-behind-pfsense.html#workaround) but unfortunately I am unable to make any configuration changes to the client. I tried with the port 500 rule removed but that did not help.

I have no issues with any other VPN connections (OpenVPN, PIA, etc.). AnyConnect just decides it doesn't want to work for 30 seconds or so every 20 minutes.

I have no rules blocking outbound traffic, and the only other packages I have installed is pfBlockerNG (which I disabled to see if that was the culprit...it wasn't).

At this point, I've run out of ideas. Any help would be greatly appreciated