Saving a track created via Manual Tracking

Hi everyone!

I used the Manual Tracking plugin to track the cell migration in my experiment. There has been no problem creating the tracks, but I am not able to save the tracks I created. Only the “raw data” without the track is saved. It doesn´t matter which kind of file I use (.tiff, .gif, .jpeg etc.)
Do you have any ideas what could be the problem that prevents me from saving the tracks?

Best regards,
Anne