I’m not all that “worried” about the dashboard – it just worries me when I log into my systems after being gone on vacation for a week and find something not working as it was before and I can’t put my finger on why it’s doing it – but I’m not hosting on any of the systems mentioned here and I’m getting the same thing – so I would say that blocking and updating is probably not the answer – something has changed and it’s causing the stream to be broken.
On the bright side, it does make the administration login faster when you go to your management pages!