Strange WordPress problem
This morning, I noticed a problem with WordPress websites that have been working perfectly fine before.
Frontend works OK, but I can't log into the backend.
HostMantis DirectAdmin reseller hosting.
I've migrated three websites to MyW.pt DirectAdmin hosting and they all work fine there!
Same setup (I did a manual 1 to 1 copy). Even same Cloudflare settings - nothing changed but the hosting server.
OK, MyW doesn't offer Redis, but even if I disable LiteSpeed plugin that is configured to use Redis, websites won't work normally.
What I've noticed and IS confusing to me:
Non-WordPress stuff works perfectly fine!
OK, so I think it's some plugin or something. But migrating to a different provider, or even to HostMantis cPanel hosting gets the websites working fine.
I've tried configuring Cloudflare to work as a DNS only - didn't help.
Tried disabling caching and security plugins - didn't help.
Tried disabling mod security - didn't make any difference.
DNS cache flush on my browsers and different browsers and computers to confirm - always the same problems.
Logs that are available don't make me any wiser (no PHP errors, while I'll have to wait 'till morning for any fresher DirectAdmin general logs, apparently, or I'm not looking in the right place).
All the hosted WordPress websites (and WP only) have 13 entry processes since this morning, when the problems had started. Constantly. With a short blip to zero about noon today - again, on all the accounts, all the websites (separate DirectAdmin accounts under one reseller hosting account).
To make things even more confusing - adding a new account with a fresh WP install works fine!
I've never experienced something like this - and my diagnostic access is very limited since it is a shared hosting environment. With WP it's a plugin conflict 99.99% of the time - but why and how does it work normally on other servers?
HostMantis tech. support says it's fine on their end. And that's about it - since 8 this morning.
I'm interested in figuring out and solving this problem (don't want this thread to turn into provider discussion - I'll start a separate thread on that).
EDIT: all's good, not losing millions, just a hassle with migrating sites. But still curious.
Mostly harmless ™