Trying to add an account kicks me out

[DidiDidi129]

Describe the bug

When trying to add a new account through the app switcher, after signing in (using matrix.org) I get kicked back to my main account and it doesn't have my matrix.org account saved.

Reproduction

1. Click on your profile picture
2. Click "Add Account"
3. Sign in to matrix.org (unsure if it affects other servers)
4. Observe how the account isn't signed in

Expected behavior

No response

Platform and versions

Windows 11, Zen Browser, Synapse (didi.party) latest sable release

Additional context

No response

[DidiDidi129]

I found extra info on this

It may be an issue with my homeserver as when I sign out of my didi.party account, and sign in with mozilla first it allows me to add my didi.party account afterwards.

Maybe it has to do with the account not being added to the homeserver list?

[7w1]

There are issues with the account switcher and SSO, only the first account works with SSO. This may be related.

[770grappenmaker]

Any updates on this? I want to login with multiple SSO accounts and it does not seem possible currently due to this issue.