https://arstechnica.com/information-technology/2021/09/privacy-focused-protonmail-provided-a-users-ip-address-to-authorities/

This weekend, news broke that security/privacy-focused anonymous email service ProtonMail turned over a French climate activist's IP address and browser fingerprint to Swiss authorities. This move seemingly ran counter to the well-known service's policies, which as recently as last week stated that "by default, we do not keep any IP logs which can be linked to your anonymous email account."

After providing the activist's metadata to Swiss authorities, ProtonMail removed the section that had promised no IP logs, replacing it with one saying, "ProtonMail is email that respects privacy and puts people (not advertisers) first."