When changing display name, not all rooms are changed, and I have an error "fetch failed: Failed to fetch"

[benparsons]

Steps to reproduce

Try to change display name, this error appears:

Failed to save your profile
fetch failed: Failed to fetch

Outcome

What did you expect?

Change all rooms, no error

What happened instead?

An error.

Operating system

macOS

Application version

No response

How did you install the app?

No response

Homeserver

element.io

Will you send logs?

Yes

[t3chguy]

This is an issue with the server. The server should not timeout like it does here. The server tries to do it entirely synchronously and its reverse proxy times out causing a CORS error. Nothing the client can do here other than potentially a better error if the spec made a suggestion for such