Redirect not working properly in IE(EDGE)?

Question

JavaScript

There is a url like domain/path/login.html
After clicking the login button, getting data and writing it to localStorage, the following happens:

backPage = localStorage.backPage
delete localStorage.backPage
window.location.href = "##{backPage or ""}"

In all browsers login.html is replaced with # or #name, in EDGE the pound sign is simply appended to login.html. Tried the same through location.replace does not help. Who faced it? Write a crutch or is there a more elegant way?
UPD: I understand everything, I have a
<base href="./">
base on the page in the head and everywhere it works fine when you change location.href everywhere except edge. What to do with it is not yet clear