Gray screen after starting screen sharing

Hi there,
we use Jitsi in our local network for internal company communication. We use the last stable Docker image together with Chrome 86. The Chrome version will be upgraded soon because the key binding no longer works (Issue # 9782).

Regardless, we have the problem that when sharing the screen, the picture for all participants initially remains gray. The participant must then first change the quality (e.g. set one level worse). Then the others see the picture and the quality can be set high again.

Is there a known solution here or is it really related to the old Chrome version?