This is mostly a case of them not really reporting it, MitID is down quite frequently (now once a month ish, but in the first few years every week or so), or at least partially down . They now finally have their own status page, previously you had to get your status from a provider when they noticed that logins began to fail ;)

They're very light on reporting issues, in this case Signaturgruppen a subsidiary of NETS, didn't even mark this as a full outage.