Thanks for the reply Phil ...
There's an Orbi reasonably close (WiFi Mesh) but most of my internet is wired. I haven't changed any of the settings (other than updated the Firmware), so I'm assuming the wireless channel is set to auto. I leave the transmitter in the Pod Go and wait for the green light before plugging it into my guitar. I guess I can try moving it to another room, but this isn't a great solution.
This feels like a device that wasn't ready for primetime if it can't handle situations like this (I'd hate to have turned up to perform at a show and experienced this issue).