This is a mission critical issue that prevents further adaptation for me. I could never use the calendar meaningfully for business purposes. It is absolute pain in the neck.

It also bugs me that there is no lookup for addresses/locations on calendar invites. For a premium-priced product, one can expect this to be functional. How hard can it be to integrate a call to openstreetmap or similar.

Frankly, the product feels a bit beta-ish for a paid for product.

Find the feature request here.

This is the official link, as seen on the very bottom of the Proton Support page here.