Wrong attribution for federated reactions

[kaffeeringe]

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Steps to reproduce

1. Post a message in a chat with federated users
2. Someone reacts to the message with an emoji
3. The notification, that I reaceive isn't attributed to the federated user but to me:

Expected behaviour

The notification should say, who reacted.

Actual behaviour

It says that I reacted

Talk app

Talk app version: 20.1.1

[kaffeeringe]

The problem persists in Talk 21.0.0