URL gets rewritten

[blk_]

Hello, I have an issue ( obviously ) 

So I have a page that displays products from different manufacturers .. that page also has a filter which sorts products by a certain manufacturerer 

The issue is: 

I have manufacturer: a, b, c, d, e, f, g 

if I filter the products by manufacturer a + b + c .. the prodcuts gets updated and when I send the URL to a friend he copy-paste it and enters it everything works.. the url does not get rewritten

If I filter by manufactuer g .. and repeat the process when my friend copy pastes the link, when he enters the page the products onyl from manufacturer G show up but the url gets rewritten, manufactuer G is not showing up in the URL 

IF I want to sort by manufacturer D, which has only 1 product .. the URL gets rewritten and the product does not even show when the user copy pastes and enters the link ..

TO NOTE: on the page every filter and product and URL works perfectly, everything gets updated how it should, the problem shows up when someone enters the url

[blk_]

UPDATE : I Found out the problem might be related to blocklayered folder