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Trek replaced the speed sensor and the issue did go away. It looks to be coincidence that it happened the same time the firmware was updated. All good now.

I have a 2021 Trek Rail 7. I took it in for service at a Trek shop last week and they mentioned the firmware needed to updated. Once I got the bike back, I have had issues with the speedometer jumping around and the motor cutting out at higher speeds. No error codes are being thrown. The...