Yes, I think this is generally something that causes the problem in my experience. Too many filters can result in way too many calls to occur. Also different things like a slow proxy/timeouts, etc. will as well. Unless of course something has changed recently.
I actually experience this only once in a blue moon. Usually it helps deleting the source and adding it back again.
The issue has been persistent for years now.
API bocks are the main reason for that error you need have many scrapper accounts so that every time an account get an API bock Jarvee will switch to another one.