Recipient of a federated share cannot edit md file

Describe the bug
When creating a federated share of a md file, the recipient is asked to choose from "Current version" and "Saved version" even if is the first time he/she opens it.

Subsequent actions of the recipient on the received file cause undefined behaviour (file infinite reloading, reloading of the same page ...)

To Reproduce
Steps to reproduce the behavior:

1. Go to instance1 with user1, create a file called new-file.md, put some contents in it, save it and share it with user2@instance2 with edit privileges
2. Go to instance2 with user2, accept the federated share and open the file new-file.md

Expected behavior
user2@instance2 should be able to edit the file or receive a clear message that file editing is not supported for federated shares

Screenshots

Client details:

• OS: Ubuntu Desktop 21.10
• Browser: Firefox
• Version: 95.0.2 (64-bit)
• Device: laptop

Reproduce the issue with new-file.md across instance1 and instance2 using the listed federated-share steps, and review the attached logs and screenshot. Determine whether the recipient can edit the shared file; done means editing works without the version prompt and reload loop, or a clear unsupported-editing message is shown.