My Edge 1000 suffered from the same malady

The Edge 820 is REALLY bad

The Edge 820 is DANGEROUS to use while cycling...which means it shouldn't be used while cycling...therefore, it is not a cycling computer.

I’m toying with returning the Wahoo Bolt (EDIT: I did) and buying the more expensive Edge Explore 1000 (gulp), in the hope that it combines the best of my old 800 (usable touchscreen, good routing, good CPU for fast redraws and a usable map page) with the Bluetooth/integration features of the 820 (Varia radar, incident detection, etc.)