Spawnable camera despawn itself and isn't used in Level sequencer

Hi,

My project uses multiple level sequencers. Each of them contains a spawnable camera with animated attributes (if required). Those sequencers are put together in a Master Level sequencer. Today, after opening the master sequencer. I have multiple shots who are grey, the camera isn’t used and the viewport is still on the last working camera.

If I dive in the individual buggy level sequencers, I can see the spawned camera in the outliner, but as soon I move the time slider, it disapears, and the level sequencer acts like the camera has disapeared, but it is supposed to be a spawnable. It doesn’t make any sense and I don’t understand what’s going on.

Any help would be greatly appreciated.

Can you attach some screenshots of your master sequence and some of the shots? Are any of the bindings red?