As a paid Proton Unlimited subscriber, I can create and share vaults - that's part of what I'm paying for. However, when I share a vault with a free user, they cannot see:

• Custom fields on shared items
• MFA / 2FA information on shared items

This creates a real usability problem when I need to share complete login credentials with someone (a family member, a colleague, a client).

The core issue: The restriction is applied based on the recipient's account tier, not based on what the paid user is sharing. I've already paid for the vault creation and sharing feature. The free user isn't creating anything - they're reading data I've explicitly chosen to share with them. Limiting their view feels like a cap on my paid feature, not theirs.

Proposed behavior: When a paid subscriber shares a vault item with a free user, the free user should be able to view all fields on that item - including custom fields and MFA/2FA data - within the context of that shared vault. Their free tier limits should still apply to vaults and items they own or create, not to content shared with them by a paying user.

Use case: Sharing complete login credentials (including TOTP secrets or custom notes) with a family member or teammate who has a free account, without requiring them to upgrade.