My first thought is you might have a weird line break. Also, if you have a theme, try turning that off and any CSS snippets to see if it happens in the default theme.
I get what’s expected (image from obsidian):
So, it is not intended to see a blank bullet in between.
Looks like a bug to me. I’d suggest switching it to bug reports.
Convoluted process to get to it.
Happens LP and Legacy, without plugin or theme, and in Help vault.
Associated with the fold triangle?