Proton resolves a six-hour degradation that followed database maintenance

Sources: incident, discussion
Summary: The Proton status incident opened at 14:37 CEST on 2026-09-01 and was marked resolved at 20:49 CEST, and it states that a subset of users saw degraded Proton Mail, VPN, Calendar, Drive, Pass, Meet, SimpleLogin, Wallet and Lumo after database maintenance. Proton states the switchover had been tested beforehand but exposed instability under load, and that the residual hardware failures are likely related to the damage suffered from the overheating incident of the previous week. Proton states all services are operational and no user data was lost, and that the recovery delayed suspicious-login push notifications by several hours.
Why it matters: A switchover Proton had tested still degraded nine services for about six hours for a subset of users, and Proton links the residual hardware failures to the previous week's overheating damage as likely rather than confirmed.
Follow-up: Track whether Proton publishes a post-incident report and whether further failures are linked to the overheating damage.