Hi Imran,
First thing first. I am unable to see the screenshots shared by you therefore I can't help you out exactly at your problem.
If you could re-share the screenshot will help me to understand the problem.
However from general preception of these type of errors, these raises when you don't set your effected category as "Anchor" in category menu.
This usually is set under categories design settings.
See here: https://monosnap.com/file/czjdCEHXbaQS5RREgtHlomzFW5cxwX
@OrviSoft I can see images, I don't know why images are not displaying to you.
I have seen that the anchor is already set to yes for the categories. I also reindexed.
See screenshot.
Can you confirm if you have any of the following is active?
1. Catalog Category Flat Data
2. Catalog Product Flat Data
3. Any indexing in pending state
If you have any of above 3, please try disabling/ re-indexing and share stats. If problem continues, than it should be investigated starting from view to block, block to controller and controller to model to see where if there is anything intercepting the behavior.