@percysgrowroom You have the tools, use them. RAW logs for your site are available, also resource usage and Snapshots. They are all there. Here i...

Are all sites using the same POOL? Memory, DB, processes?

We are using 10.3.28-MariaDB everywhere and works just fine. And our hoster is extremely carefull with updates.

Well i can't guess, maybe. Is the issue happening the same time every time? What is your Cpanel resource usage saying for LAST 30 DAYS? is it a DB i...

Ok this is definitely a hosting / server setup issue and not related to wpForo plugin,

Did the plugin for bot blackhole helped at all? Do you have ANY statistics for your plan or server, like resources usage? So we can be sure it is a ...

@rilame What Wordpress health says? What debug . log reports? What kind of hosting is that? pre-installed? Managed? You installed it?

Ok, i can provide some help, only if you are willing to try, without interrupting your website.

HostGuard seems like a control panel.

Stuff on your server?

Do you have ANY kind of protection right now? You still have this spam protection they use here also? Anything? Firewall?

The solution will come only if and when you pinpoint the cause.

@onurkansan Don't delete anything. I'm sure wpForo support will help you on this.

Doing that will deindex all his /forum/ topics. What he must do is the opposite. Change the community thing.

@jatin The lightbox plugin works great, i use it in 3 WP sites. Maybe some optimizer is the issue.