Fenix 6 Silver abnormal floor climbing recording

Hi. I am at the latest firmware (5.0) for Fenix 6 firmware.

For a few weeks now I feel that the watch goes crazy with the floor climbing counting, even if I don't climb at all.

Let me give you an example. In the morning I start walking and after aprox 1 km i got the kudos for 10 floors climbed. (90m elevation, my walking is completely flat, no stairs in my way).

After one work day I got like 45-50 recorded floors. Which in reality it's more like 7-8 (recorded with fr645m, and iPhone 11).It wasn't always like this. It worked great.

I factory reset it. Same thing.

Anybody else got this behavior?

Thank you