Can't see when someone has raised a hand

I was chairing a meeting but found it difficult to see when someone had raised an electronic hand to ask to speak. Their name appeared briefly on my screen but remained there for only a few seconds, and I could only see an icon when I hovered over their image. I was constantly having to check all the images to see if they had raised a hand.

If this is how it is meant to work, it is not fit for purpose. More likely, I was doing something wrong. How can I ensure that raised hands are clearly visible?