Maybe important information for Sharkey (Probably Misskey in general) Fedi Admins:

Starting about a week ago I noticed my instance crashing due to some uncaught websocket exceptions like "Invalid WebSocket frame: RSV1 must be clear"

Turns out the Applebot crawler has been attempting to connect to the streaming endpoint of my instance, repeatedly, sometimes multiple times within the same minute.

So if you have something similar going on, you might wanna block that from accessing the streaming endpoint / your instance entirely.

They at least nicely identify themselves as "Applebot" in the user-agent so its not too hard.