Since a recent update on windows (I’m currently on v1.0.70832, but the issue appeared a few updates ago), the activity type on Strava is intermittently incorrect (runs appear as rides and vice versa).
I haven’t fully confirmed, but the activity type seems to have stuck on what was originally selected on the pairing screen during startup, with changes being ignored. If the type is not changed, the activity uploads correctly. Oddly, TrainingPeaks seems unaffected.
Cheers
Mat