Some Magento 2 store owners have reported issues with products randomly disappearing from the category view on the storefront and search pages. 

This issue occurs even when the product’s details are correct, and after indexing, the problem is fixed temporarily. 

The reason that products disappear randomly can be due to reindexing or cache issues. 

Here is the permanent solution to this problem. 

Solution: Products Randomly Disappear from Category View

The solution is not very complex.

First, try to reindex the file. Then check the system and the exception log. 

If you encounter any errors, please resolve them or contact us to assist you in navigating this issue.   

Lastly, make sure you have configured OpenSearch properly, since the issue may be triggered from there. 
Try this solution out. If you face any issues, please get in touch with us. My team and I would be glad to help you.