ENDIAN Firewall - EFW 2.5.1 HP Printer Embedded Web Configuration Page

I have a weird issue I am hoping someone else has seen and maybe found a solution for.

I have multiple sites - each connected with EFW 2.4.1 or 2.5.1 using IPSEC.

I have an HP m2727nf Printer at each site. 5 of my sites are using 2.4.1 and 2 are using 2.5.1. I was planning on moving all sites to 2.5.1 until this issue was discovered.

The issue is that I can no longer connect to the Printers Web Admin page (embedded on the printer) from my location (lets call it HQ) on the sites that have a 2.5.1 FW installed. Even if I turn everything off - the page never loads. I can connect via a computer on the local network. Sites that have a 2.4.1 FW installed do not have the same issue - the page loads as expected. I tried moving a printer from one site to another thinking the issue was HW specific, but its not. The issues didn't follow the printer - it stayed with the site. If I reinstall a 2.4.1 FW I can then connect to the printer. It is only when I have a 2.5.1 rounter installed that I can not connect. I also updated the firmware on the printers - no change. I can printer to the printer fine, it just appears to be the Embedded web page that is the issue.

Any help would be greatly appreciated.