I've uploaded a number of gpx files and they appear as normal until I move from Training & Planning / Courses to view my Activities. I then go back to Training & Planning / Courses / My Courses to find they have all disappeared and furthermore no courses can be found near me, with map making out I'm in USA whereas I'm in UK! I'm still logged into my account and I'm not using a VPN. This has happened several times, last time I looged out and back in again to find my courses restored. What is wrong?