Visualization of products in TakePOS

Hello,

I am facing a problem with number of visualized products in TakePOS module (version 18.0.1).
When I select a product category not all products are being shown in the products list, in some cases I need to select the next page to see all the products in this category even though there are empty cells in the first page.

For example, I have product category A, which has a total of 6 products for the particular shop, but takePOS module is only showing 2 products in the list and I need to select arrow (next page) to see the remaining 4 products.

Could anyone tell me what might be the problem and what settings I should change to see full list of the products of a particular category.