The Core

Recently we had a bunch of issues with clients sites getting "kicked off" Webmaster Tools - eg. our verification has gone and we cannot verify the sites again using the GA or Tag Manager scripts as a verification method. In most cases  even the client/owner of the account has been booted. Resubmitting the sites and verifying using the html file upload works, but all users are gone?

Anybody else experiencing this?

sorry, we have had some random drop outs before but not on the scale you're describing and not across all clients - I've generally put it down to mistaken removal of code, or the general category of 'it'll take longer to work out what happened than just fix it'

It'll be the middle of next week I'll massively notice this if it is happening to us - at present I can't see obviously broken reports and haven't seen anyone complaining about them internally...so I'd guess its not.

I've had a couple as well.  There has always been a client involved, so we've assumed no fault on G's part.