@tutrix In fact, I do a comparison with mysite.com/blogs/

I know you know my site, just do the test with my real site and you will see.

I have already done

but here again the two tests

mysite.com/community mysite.com/blogs

@Tutrix

I did the test again, and I got the same issue. I shared with you also the device simulated, bandwidth, location, etc...

COMMUNITY

BLOGS with WP Rocket

Here the result with GTmetrix. Same difference

COMMUNITY

BLOGS WP Rocket

Please advise.

As i said, forum HOME is somehow not cached well but all the inner forum pages are fast: