Reactions cause the speaker to become inaudible for a short period

### Steps to reproduce

1. Join a group call
2. Listen to the speaker
3. Reactions are sent by other participants
4. (Sometimes?) the speaker is not heard until the reaction stops

### Outcome

#### What did you expect?

The reaction overlays with the speaker audio nicely.

#### What happened instead?

The speaker became muted / inaudible

### Operating system

Mixed

### Browser information

Mixed (FF/ Chrome)

### URL for webapp

call.element.io

### Will you send logs?

No

Reproduce the issue in a group call at call.element.io while another participant sends reactions, testing the reported Firefox and Chrome cases. Trace the reaction overlay and speaker-audio behavior during the reaction; done means the speaker remains audible while the overlay is displayed.

Written by the indexing model from the issue text.