How can a detached node merge into a git branch?

Question

I am using GitKraken on Windows. While I was deleting the remote branch to the local one, I saw this wired log chart circled in the image. It looks like there is a separate node, node without a parent, but it can merge with another branch ... not sure what that means, any idea?

Update after @VonC comment

In this image, committing with the hash 52a66d2 prefix is problematic, and it looks like there was a parent in this view.

So maybe this is a GitKraken bug ?

Answer 1

, commit 52a66d2 3 , , 3058015

, 52a66d2 (3058015), .

( ), --date=relative.

(. git show-branch, )