Camera_thumbnail deprecated

Hello, i use camera_thumbnail on my dashboard on my old tablet, and now i see the message

WARNING (MainThread) [] The websocket command 'camera_thumbnail' has been deprecated.

Why is beem deprecated? Changing to stream changing to stream causes the tablet to run out of memory after 1 hour and the Kiosk app goes down, having to open it again!

Is there an alternative to camera_thumbnail?