Losing footpod connection after about a mile of running

I’m using an LG G6 and a Zwift footpod. Everything connects and I can calibrate the footpod. I start a run, and everything works great for the first mile or so. Then I lose the connection between the footpod and my device. At least that’s what I assume is happening. My pace drops to zero and in Zwift I’m just standing there while I’m running away on the treadmill. It’s happened both times I’ve tried running in zwift.