MediaRecorder.stop() doesn't clear the recording icon in the tab

I start and stop a MediaRecorder stream. The red "recording" icon appears in the Chrome tab on start, but doesn't go away on stop.

The icon looks like this:

My code looks like this:

const mediaRecorder = new MediaRecorder(stream);
...
// Recording icon in the tab becomes visible.
mediaRecorder.start();
...
// Recording icon is still visible.
mediaRecorder.stop();

I also have a mediaRecorder.onstop handler defined. It doesn't return anything or interfere with the event object.

What's the proper way to clear the "recording" indicator for a tab after starting and stopping a MediaRecorder instance?