Camera auto exposure and auto brightness buttons disappeared after working fine

The auto exposure and auto brightness buttons have suddenly disappeared from camera controls after working fine for weeks, and no settings have been changed at all.
The custom camera controls in settings are ticked, and i have toggled between custom and default and restarted lightburn…
I am using a lightburn camera 90°and running windows 10, and up to now everything has been working ok.
I am new to laser engraving and have been using lightburn for a few months and would appreciate any help as i use these all the time and are great for varying lighting conditions.
many thanks

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