Last night, Cloudflare had an outage on their global DNS resolver, which affected millions of users and websites all over the world. I think they fixed it fairly quickly, but the thing with DNS is that it caches requests and sometimes continue to cause issues for hours past the source issue being fixed. This type of issue is a nightmare, because some users will experience tons of issues while others barely notice anything.
At least it isn't SS's fault, just unlucky that they rely on one of the biggest DNS providers in the world. Well, not just them, but all users who has configured their devices to use 1.1.1.1 as DNS would have barely been able to use any web service during those hours.
I don't know if the text editor issue was related to this, but it's possible if the forum relies on an external service for it. I'm not on my PC, so I can't check, but I think it's likely that it is the case. If anyone still has issues, things should go back to normal within a few hours.