On Edge1040/1050/830, the GPS tooks several tens of second to respond to any touch screen request, or key press,
when the 'Shimano Step' sensor is activated with track guidance.
This not due to electromagnetic interferences, because there is same issue when the GPS is moved away from the e-Bike.
I think the GPS Software hang in an infinite loop, waiting an ANT+/Bluetooth answer,
bu t due to a mismatch in the transmission protocol,
the software will exit from loop on a fixed Timeout,
then it performs the user request after a very long Time
Several Garmin Egde users have the same problem, according to the Garmin Edge Facebook groups
