Loss of Bandwidth after 14 to 24 hours

Hello,

Setup, Comcast(router/firewall) speed at source is ~500mb,
1 port to Pfsence network, where i have my servers storage and personal wifi.

Every 12 to 24 hours my bandwidth on my Pfsence goes to 170mbs,

Rebooting Pfsence it the only thing that fixes the problem…

any ideas on where to look…

Check the all the log messages, look for errors.