Hi! i just found bug in nopcommerce.
We can open pages https://demo.nopcommerce.com/digital-downloads/ but also we can open https://demo.nopcommerce.com/digital-downloads without "/" So we have two 100% identical pages, with only one difference "/" in url. It's shouldn't possible.
We should have redirect to only one page (i think without "/")? now we have duplicated page. (i just check our analytics and we have 50% / 50% on same pages with only one difference where is "/".
It's possible problem is in all 4.40 version... but i see in my case problem it's when we upgrade nop to 4.40.04 + start use noptemplates ajax filters. I don't check it in 4.50 version.