Emoji reactions cause phantom pushes on EX

[ara4n]

Steps to reproduce

1. Do a EW+EC -> EW+EC call
2. Send some emoji reactions to the other person.
3. Their EX buzzes with a blank notif every time they receive an emoji reaction in the call

Outcome

What did you expect?

Emoji reactions sent on video calls shouldn't result in mobile push notifications firing.

Operating system

No response

Browser information

No response

URL for webapp

call.element.io

Will you send logs?

No

[Half-Shot]

This sounds like an EX bug where it's trying to surface unrenderable timeline events as notifications? If EX can't handle rooms sending custom events, that rather screws up a lot of use cases.

[Half-Shot]

Having considered this further in standup, this is likely that EX notifies on every encrypted message. I assume because we make the invalid assumption that every encrypted message should be noisy (as it might be a message?).

[robintown]

I've had to reopen this manually on the Element X repo since I don't have permission to transfer: element-hq/element-x-ios#3632