Web-based iCloud login page
Overnight, a notable portion of iCloud users were getting logged out of their accounts across all of their devices, and the only way back in was to perform a password reset.
The log-outs weren’t — or aren’t, it’s not clear yet — happening on one particular class of device. And, if you were impacted, it’s across nearly all of your devices including HomePods, Apple TV hardware, iPhone, iPad, and Mac.
As of April 27 at 6:43 AM, there is still no indication of an issue on the iCloud status page. It’s hard to tell if the issue has settled, as the US east coast is just waking now and associated keywords on social media have been hijacked by spammers.