AX2400/RAX29 - hairpin/loopback NAT issue?

Thanks for the tip.  I did try going back to the oldest firmware listed on that page, and the problem still exists.  As a workaround, for the time being, I figured out that it's only when the internal/external port were the same, that I'm having a problem.  If the router is translating to one port to another, oddly enough, it works just fine.  So, instead of listening on port 8080 internally and externally, I changed the internal port to listen on 8079, and externally left it to 8080, and it seems to work.  Definitely seems like a glitch in the firmware.  If I have time, I'm still considering to a factory reset, to see if that works.