Store has Magento 2.3.3 with Varnish 6, Redis 5 and Amasty Layered navigation enabled for filtering and pagination ajax calls. After setting up above configuration, navigation through category pages. Previous and next page clicks via Ajax calls works fine. Next day or after 24 hours or so, no response after clicking previous and next category pages. Issue disappears after clearing page cache.
Do I need to modify VCL to either exclude Ajax requests or cache ajax requests? While click next page or previous page I see XHR requests with
&shopbyAjax=1 appended to paginated URL. Example https://www.example.com/salwar-kameez?p=8&shopbyAjax=1