Like a GDPR privacy plugin. Disable your plugins one by one and see what is the cause.

Before this downgrade can you please enable DEBUG TO A LOG in your Wordpress site?

I have seen such session issues with caching plugins (you do not use as you say) and with other also plugins. Like a GDPR privacy plugin. Some plugi...

@percysgrowroom Robert or Martin have suggested to downgrade to 1.97. Have you?

Well i offered as much help and ideas as a could. Servers do not go down, they just reboot if correctly configured. Your database goes MIA for some...

If your Database server has too many connection under load, it is VERY EASY TO FIND IT. Enable Wordpress debug to a log. In there you will see "Too M...

If you do not find the cause, you will never solve your issues, in this hoster or any hoster. Going from ISAM to InnoDB and back, will not solve you...

there are also errors in the page: Uncaught ReferenceError: jQuery is not defined <anonymous> :727 community:727:1 ...

it seems like there are several issues, see the red space (outage) and right after that the peak. And see the peaks. We will see after an other 24 hrs...

@percysgrowroom I took the liberty to add your Forum url to our monitoring system, every 5 minutes. Let's see how it goes for the next 24 hours. Th...

Yeap. We NEVER do, that is the policy. 😷

@wendell Just checked also in a forum for a customer using adv attachments and works also fine. I discovered an issue but not related to yours. The ...

Is that using the adv attachments plugin or just the wpForo plugin? Got me curious and tried it myself and works just fine (the attachments).

@percysgrowroom here is a capture of my Cpanel, if you do not have that maybe it is not enabled.  Screenshot.png

@percysgrowroom For me, it is at Metrics / Resource Usage / Details / Time Frame / Date Range / Last 30 days