Xiaomi Mi 150 Laser Projector HDMI source on wakeup from Apple TV 4k

I have a problem with the Xiaomi Mi 150 in combination with the Apple TV 4k. I can easily switch the Xiaomi MI 150 on and off using the remote control of the Apple TV 4k. The Xiaomi MI 150 then goes into standby and can be switched on again very quickly. 

But the Xiaomi Mi 150 forgets the HDMI source selected before standby. After waking up from standby via the Apple TV remote control, I have to manually select the HDMI source where the Apple TV is connected again. 

I would like the Xiaomi Mi 150 to display the Apple TV content directly after waking up from standby. 

This used to work automatically, but no longer works. Does anyone have any tips? Any Apple TV settings to try?