Deletion of original post with replies works weirdly

Steps to reproduce:
Suppose person A creates a post.
Then, person B replies to it.
Then, person A deletes the post.
The website would then show it as person B having started the post, which is incorrect.

Expected behavior:
there should be some sort of indicator telling users that a post was deleted
kinda related to https://orionfeedback.org/d/3365-delete-messages/2

I suggest a generic "a post/message was deleted" rather than "{username} deleted a post/message"

example:
see how the first "asdf" is the original message.

then, if I were to delete that, the "first reply" message becomes the first one, with no indication that it wasn't actually the first message.