Hello,
1/ The problem was caused by incorrect settings for this plugin – https://xstore.helpscoutdocs.com/article/65-woocommerce-infinite-scroll-and-ajax-pagination-settings We’ve set settings according to docs and the problem is fixed. Clear cache and check now.
2/ Check your additional customization in child theme – https://prnt.sc/T3C_LEkYME9O
3/ There is no such option for categories. You can submit a request here – https://www.8theme.com/taskboard/
Submit separate topics for different questions next time, please.
Regards