Ant Connection with indoor trainer only with widget

When I start an indoor training on the edge 1030+ the ant connection to my indoor trainer is stable - but only for about 20 seconds.

But - Ant- Connection stays stable, when i swipe on the edge 1030+ to the indoortrainer widget.

Any suggestions for causes for this unexpected behavior or for fixes?

I'd realy like to use the dedicated training pages for indoor training ...

br