Captive Portal and fragmented HTTP downloads

[MagnaPilot]

Hello everyone,

I've been running OPNsense for roughly a year and a half now, and have recently come across an issue I can't resolve.  I run a wifi network for general internet access, with your typical IDS and Firewall settings, no proxy at the moment.  The server is a 3x core CPU, with 6 gigs of RAM, and a standard HDD for storage. 

My issue is related to the Captive Portal, recently, it began causing issues with HTTP downloads of more than roughly 30MB or so, it would then fragment and RST the packets until it failed.  I have literally reset every setting I can find, and nothing seems to effect it other than disabling the captive portal.  I can provide Wireshark logs to demonstrate if needed, it's very odd.  We generally use username/password and MAC for authentication on our portal, with nearly 70 devices currently in the MAC table.  This issue started a month or so ago, and I have not found a common event to link it with.  Any help would be appreciated.