A kind thank you to @nykula on GitHub that has recommended a plugin to workaround a bug with our forums that was causing it to take our entire website down. This is a result of a huge spike in bot traffic that the forums were never prepared to handle.

At time of writing this, the website stability issues seem to have subsided. More details here:
https://github.com/LMMS/lmms.io/issues/ ... 4512709012

Moving forward -- phpBB (the app we use for the forums) -- has a newer version 4.0 which significantly improves the handling of bot traffic, but it's not yet reached stable; when it does we'll upgrade so that the workarounds can be removed.