The filter doesn't read all products

Problem:  the price slider filter counts only the visible products on the page or the filter doesn't read all products

Solution: 

In fact that, the price slider shows only the min and max of the showing products, not all product in a category.

But for example, If you have 2000 products and you need to show only 20 products per page. We regret that now we have not had a solution for this, it is in library. 

However, we can only suggestion that if possible, please use normal filter, we mean without slider. 

You can go to admin STORES -> Configuartion -> Ajax Layernavigation [ MGS ] then disable the price slider.