Elevation gain issues

Hello,

Since the new 26.97 software update I have massive elevation issues. On all my activities, run and bike,  I am getting 100x elevation gain. Even now he is showing me I am on 11823m above sea level. I tried calibrate but did not fix the problem. On my city flat mtb ride he showed I gained over 44000 m elevation.

Anyone have similiar issues and knows how to fix this?? He is also wrong with storm alerts and  now altitude acclimation. Never had this issues before this update.

Please help!

Cheers