Help w/ TouchOSC - one way communication

I'm having trouble maintaining 2 way communication between TouchOSC on iOS devices and Nomad on a PC as well as an Element.

I'm baffled since the communication direction is opposite on the Nomad from the Element. On the PC/Nomad, nothing I do on the ipad gets sent to the PC. On the Element, it's the opposite - I can make changes using TouchOSC, but nothing from the console shows up on the ipad (which means I get no feedback on the command line about what's happening.)

On the PC, it does work occasionally, but then it stops. There have been no router changes, so I don't believe it's any sort of firewall issue (at least on the Nomad front).

Anyway, I'm at a loss and would really appreciate some ideas on where to look next.