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Running power is measure 10x than normal

Hi,

I use a forerunner 965 and HRM plus for my runnings and usually I have running power around 300-350Watts. Yesterday and today (08 and 09 December) my watch shows a running power of 4000watts(I wishLaughing)

Has anyone faced this issue and knows how to fix it? 

NOTE: my calories for today run for a 15km run were almost 3000 (completely off as well). Can be correlated with the running power