Does deleting the newest commit in lazygit is the same as git reset --hard HEAD~1?

**Topic**
the version is 0.37
i have a git repo commit log like this, it's a tig show in nigthtly branch. I use tig snapshot because its log graph is clear.
there is a master branch , i checkout nightly and feature1 branch from it. Then make a commit on nightly, make two commits on feature1, at last merge feature1 to nightly, no conflicts.

All the operations below is happened in nightly branch.
Then i just need to delete the top merge commit. so I delete it in lazygit by press `d` in commits pane. but the result is so confused.
It deletes the merge commit and also the commit I did in nightly branch and cherry-pick 2 commits of feature1 to nightly. But I think it should only delete the merge commit as `git reset --hard HEAD~1` does.

**Your thoughts**
If it's not a bug , what the exactly delete commit means in lazygit?