All known issues are documented in http://forum.gps-laptimer.de/viewtopic.php?f=39&t=1693 Two ideas for your situation: a) no / wrong track set loaded b) used Video Preview while driving. The later will consume too much processing capacity and drop sensor data. At least for iOS12 and high res d...

Hit the track this past weekend, excited to use the xgps 160 with HLT. Was connected and HLT was showing ready with the xgps under the sensor. Went to go start the lap and HLT would not start the lap with the xgps connected. Using my iPhone XS gps worked fine.

Is there a known issue I am missing?