Occasionally the F-1 will experience glitches when racing indoors. This is most commonly caused by interference from an RFID lap counting system such as the Core. While you cannot always eliminate the problem completely, moving the antenna away from the metallic center bar will help considerably in most cases.
The following tutorial is a very simple modification that we do to our Team Cars, it should increase your range a bit and also decrease your glitching. The best thing of it all is that it costs nothing to do at all!