Pagination using # instead of ?

After updating to the latest nopcommerce with the latest version of the theme:
When going to page 2 in a category, I keep on seeing the same results.

It looks like pagination is using # instead of ? character in the url to change the page.
Where and in which theme file should I change this?

Wrong url: /indoor-kasten#/pageSize=12&viewMode=grid&orderBy=0&pageNumber=2
Working url: indoor-kasten?pageSize=12&viewMode=grid&orderBy=0&pageNumber=2

Thank you.

Hi
Are you using third-party plugins for the Ajax filtering? Something like ajax filter from Noptemplates?
Can you try this in clean NopCommerce theme without the plugin if used and see how it goes?

I confirm that when disabling the 7spikes Nop Ajax Filters plugin, it's working again.
Many thanks!