Just as the title says, when I go to import my garmin history of fit files, the import pulls in a bunch of “other” files with durations between a few minutes to 15 hours. These files don’t seem to have much content other than time duration.
If you go back and look at the sessions, are they something odd / unique that doesn’t match with a label? Or are there other files in with the fit files?
If not, looks like a bug so best is probably to email the info and sceenshots and device info etc. to support@athletica.ai if so

