Magento – Magento 2 All Products pages Redirect to catalog search

I am facing an issue which is I am not able to access any products pages.
Either trying to access them directly via product URL or product page

Or via Search Results

Or via Site Navigation

every time I try to access a product I get redirected to
a search results page instead of the product page

catalogsearch/result/

for example

http://www.mydomain.co.uk/catalogsearch/result/?q=catalog+product+view+id+28307+s+test-20-june-products

This issue I noticed after I upgraded from Magento 2.2.2 to 2.2.6 But it may have been happening from before until most recently the site and links were working fine.

One other change I made is to remove the .html for categories via the admin settings Admin – Stores – Catalog – Catalog

Search Engine Optimization
Category Url Suffix –

I enabled Flat Catalog:

Use Flat Catalog Category – YES
Use Flat Catalog Product – YES

Create Permanent Redirect for URLs if URL Key Changed – YES

I have run this extension to regenerate new rewrites
https://github.com/olegkoval/magento2-regenerate_url_rewrites

But the same issue is there.

Also, I noted that after the extension has run checking the URL rewrites information in admin it showing redirect type – NO

should this be showing as Permanent?

I have Elastic search and Amasty Elastic search – Amasty Advanced Search extensions installed but the site was working fine previously with this extension – I am not sure if the issue is Upgrade related pro Happened after I made the changes mentioned above

Really appreciate some help with this