This dotwatcher makes a valid point on Facebook. Of course it's important to recognise that the tracker may be a bit dodgy as they can be in the mountains but with so many pings reported off the route, this does look suspicious. The cluster of dots is near a cheese shop and I'm not about to deny a man his fair share of Swiss cheese but the rule is: if you leave the route, you must rejoin where you left it which certainly hasn't been the case for Markus here. He rejoined the route at Saanen further down the road.
For comparison, here is Jochen's trace along the same stretch of the route.
If anyone has any news on Markus, get in touch.