yes iPrimus, you seem to be experiencing the same symptoms with Verizon as we are having here with our telecoms in the Philippines. are you on the eastern or western seaboard... do you ever get the red "connecting to network" sign?
waze support tried to pin this anomaly down but wasn't able to make any sense of it's findings based from the details & data we've submitted. what is being suspected here is a failure to have a good connection to the waze servers. remember, you may have a strong cellular signal but does the signal carry data connection?
just like your wi-fi, try unplugging the modem. you're still connected to the Wi-Fi... BUT you don't have DATA in it because the modem is out/off/dead/kaput. with waze, the client app may not have been able to connect properly with the servers, thus returning a 'blank' form to the phone/device.
on the matter of why it still doesn't show or come back despite having a GOOD RELIABLE data connection is still a mystery as far as i'm concerned. this matter is still being looked into.
Pinoy wazers... join the Pinoy waze community on Facebook & the Forums