MiFi6620L & peplink SOHO internet connectivity issue

[jfedullo]

I reverted from 6.3.3 Firmware on the SOHO to 6.2.1 and it seems to work. I found the link below which may indicate I have a setup problem, but the resolution is not clearly posted. Again, any tips appreciated.

Firmware 6.3 broke Verizon Jetpack 6620L

I recently upgraded to Firmware 6.3 on a Balance One. Since then, the Verizon Jetpack I use through the USB connection no longer works. I can ping various websites through System>Ping when logged into the admin interface. One ping command works and reports latencies for all five pings. The next ping does not work and then the Balance One says that the Jetpack fails a health check. The Jetpack is configured as highest priority backup. However, when I bring down my WAN 1 interface and only use the…