Eufy Cam 2C No Refresh in Homekit Home App

Yesterday I exented my homekit setup with two eufy 2c cameras. The setup in the connectivity with homekit worked without any problems. Now I have the issue that I can see a livestream in the home app if i click on a camera in the favorite view but the preview pictures of the cameras doesn’t refresh after 10s. I have still the sam picture there. Has anyone a idea that can solve the problem or simular issues?