Update: So I contacted Garmin and they asked for some more information which I've sent to them and am also posting here. Luckily(?) for me I've found a patch of road where it's super easy to trigger this undesired behavior.

Here in NYC Riverside Drive has a metal bridge between 129th street and 134th street. This style is pretty common to the area. Here is a photo:

https://www.google.com/maps/@40.8186...pg!7i596!8i900

I went out this morning and did 4 runs up and down this stretch as this is a place that I can replicate the problem at will. Here are the shaky videos so you can see the problem:



Run 1: Preferred setup
• Sensor on front wheel
• Northbound
• Garmin HR strap present
• Stages Power meter for power and cadence present

https://www.youtube.com/watch?v=g71z...ature=youtu.be

Result: 5 cutouts



Run 2: Preferred setup
• Sensor on front wheel
• Southbound
• Garmin HR strap present
• Stages power meter for power and cadence present

https://www.youtube.com/watch?v=fhGh...ature=youtu.be

Result: 5 cutouts



Run 3:
• Sensor on rear wheel
• Northbound
• Garmin HR strap present
• Stages power meter for power and cadence present

https://www.youtube.com/watch?v=2yxb...ature=youtu.be

Result: 6 cutouts



Run 4:
• Sensor on rear wheel
• Southbound
• NO Garmin HR strap present
• NO Stages power meter present

https://www.youtube.com/watch?v=x_NZ...ature=youtu.be

Result: 5 cutouts