Sudden massive incline jump

The incline suddenly jumped to 15%,on screen & the Cycleops reacted  as if that were accurate.  I stopped the ride, removed the bike, checked the setup & found no cause on my end.  When I restarted, all was well.  Was this problem on my end or yours ?

Do you have a strava activity you can share that shows where this happened?

No I don’t, I recall that I was on Box Hill.

Open a Strava account Len, and then upload your activity to that Strava account.