Did you change the fit-file format?
For a few weeks now, it seems that the Fit File format has changed. Recently, rides are always recognized as MTB after uploading them to Garmin and no longer as virtual rides. This is not ideal.
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Many thanks for your message and support for TrainingPeaks Virtual.
The FIT file format hasn't changed for a very long time, so we suspect that something else must have changed in the Garmin import process to have caused this.