Wonky Mission Control map tracing

My Mission Control ride tracker has always been superbly reliable but seems to have lost the plot recently. Look at today’s one attached. We would have got a little bit wet and drowned cycling through the sea! I don’t understand why it’s started doing this. Anyone else having a problem?
 

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My Mission Control ride tracker has always been superbly reliable but seems to have lost the plot recently. Look at today’s one attached. We would have got a little bit wet and drowned cycling through the sea! I don’t understand why it’s started doing this. Anyone else having a problem?
Mine does this if I lose gps service during a part of the ride.
 
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