I didn't mention the specifics because I was after a more general answer (assuming that few would have my watch/app combo), it was more about how an app would suddenly stop working (after an OS update), then after loads of failed attempts over a few weeks suddenly start working again without any updates or other interventions. The watch/app are from Suunto and there has been nothing on the company's website or the developer's website about any issues. Up until this experience I've not had such a problem (1st World) before. I just wondered if anyone else had had such a weird experience. :-)