Why is the wrong algorithm being used for elliptical workout?

Apple Watch 12 algorithm for elliptical wrong. First time I did an elliptical, it showed the algorithm for elliptical but after that time when I check METs, I get other or walking. Both of those are incorrect and led to my calories plummeting. When I do a core workout, it is correct. Why is it not showing the correct algorithm when I do an elliptical?

I have contacted Apple support and it is still not resolved. I think it’s a bug in the software.