We have a change that we are testing that we want to deploy next week that will finalise some temporary changes we put in that might be related to some of these issues.
But olx and mybb (unless you mean mybb speedtest) don't really fit with this possible explanation.
Please send a mail to support at telkomsa dot net and PM me the ticket number so we can have someone work with you to narrow down the problem.
Mybb site, forum and speedtest all hang on loading when it happens. Its happened too often for me to be a coincidence, so, somehow, somewhere it has to be related/sideffect. Olx I only noticed earlier, so will confirm over next few downtimes.
I'll drop support a mail and pm you. Thanks for taking the time to help, I do appreciate it