Unable to see chat when screen sharing full screen slides

In the last couple of days, when I've been screen sharing google slides (and viewing them full screen), I can no longer see the chat. I'm the host, and the chat window is there when I am not full screen - but it won't 'pop' over the top of my full screen view when sharing. I've had to 'esc' out of full view, to see the chat. Anyone got a fix? Thanks.