Jumps to the wrong URL when visiting qastack.ru (and similar websites)

[pakutoma]

For example, this link:
https://qastack.ru/programming/11227809/why-is-processing-a-sorted-array-faster-than-processing-an-unsorted-array
Expected:
https://stackoverflow.com/questions/11227809/why-is-processing-a-sorted-array-faster-than-processing-an-unsorted-array
Actual:
https://stackoverflow.com/programming/11227809/why-is-processing-a-sorted-array-faster-than-processing-an-unsorted-array
// Page not found

Note: This issue probably happens only stackoverflow.com and original website's link (.text-muted > a:last-child) is wrong too😂