"Raise hand" symbol no longer disappears automatically

So, I’m running a Jitsi Meet server, latest stable release, Ubuntu 18.04 LTS, latest Prosody release via their PPA.

Some of my users have reported that the “raise hand” symbol no longer disappears automatically whenever that person is talking. I have never even noticed that this is a thing; I had always assumed that you had to lower your hand manually by pressing the button again. I’m not sure when this functionality has stopped working on our server but I’m kind of at a loss here. I didn’t apply any configuration changes in the past weeks - no idea why it is no longer working.

Can anyone give me a hint how I can make this feature work again?

bump Ideas, anyone?

Yes any update on this issue. my participant started to bugg me that this feature is not working anymore.

Any idea?