Products are being disappeared randomly

[zuber_pnk]

In Magento 2.3.4, frequently Products are being disappeared from listing page and upon next refresh it works. I checked all possible cases but failed to find out the root cause.

Can some share the possible reason / solution for it?

[Kelli Gettinger]

Is the problem you're experiencing similar to either of these two?

https://community.magento.com/t5/Magento-2-x-Technical-Issues/Product-Category-issue-Products-being-...

or

https://community.magento.com/t5/Magento-1-x-Technical-Issues/Products-being-removed-from-Categories...

[Kelli Gettinger]

Found the solution for myself and wanted to share:

If you are using ElasticSearch or ElasticSuite for your search functionality and you have multiple Magento2 instances running on the same server (ex. Production server and Staging server); you need to ensure that they have separate values.

ElasticSearch:

In the admin go to Stores > Configuration > Catalog > Catalog > Catalog Search > Elasticsearch Index Prefix

This needs to be a unique value compared to other stores.

ElasticSuite:

In the admin go to Stores > Configuration > ElasticSuite > Base Settings > Indices Settings > Indices Alias Name

This needs to be a unique value compared to other stores.