Webinar Crash

I have two different Zoom accounts set up on Zoom One where different groups attend webinars at the same time. This morning at 12h30 SATS, both of the accounts crashed at the same time and would not allow the hosts back into the webinars. Both of the accounts were run on different PCs, different networks with back up power supplies and at different locations. What could have caused this and how do I prevent this?