Cadence data not read from FIT or written to GPX

[routeconverter]

I found an issue with the files that osmand seems to write: it mistakes the XML schema location for the XML namespace.

If you change

xmlns:gpxtpx="https://www8.garmin.com/xmlschemas/TrackPointExtensionv1.xsd"

to

xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v1"

then RouteConverter reads speed, temperature, heartbeat rate and heading (not displayed though) from your example file.