Maybe you have passed pawns checked in the menu?
Puzzle themes on Chess.com

I thought some of the puzzles are taken from people's games and not auto-generated. I think you can view the players that played it somehow.

I haven't done puzzles on this site for well over a year, so I was curious how they now show after the changes that have been made. It seems you can select the themes you want to practice (see below); so as post #2 suggests, perhaps you don't realize you have them selected. Good luck with your puzzles.

You can vote themes up or down. Many exercises have horribly wrong themes. The only themes that are consistently valid are mate in three and the like.

Also they are auto-generated by computers so...
They weren't auto-generated. They were crowd sourced and suggested by members. You can still upvote, downvote and suggest themes on puzzles.

Also they are auto-generated by computers so...
They weren't auto-generated. They were crowd sourced and suggested by members. You can still upvote, downvote and suggest themes on puzzles.
Is there a way to weight the votes, privileging the votes of people with more understanding?
Crowd sourcing is imperfect?

A problem with crowd sourcing is that the views of those who know nothing, or worse know things that are false, are just as valuable as the opinions of experts. John Stuart Mill believed the marketplace of ideas would lead to truth, but the historical evidence suggests otherwise.

I found this regarding some of the problems with crowd sourcing. http://historynotebook.blogspot.com/2020/06/crowd-sourcing-vs-expertise.html
Whenever I look at the theme of a puzzle, there is always the theme of passed pawns, even in puzzles where passed pawns are completely irrelevant. Why do the themes always contain passed pawns? Is there a way to fix this issue?