picture_settings only contains the last set values

[nisargjhaveri]

I was trying to integrate the new picture_settings and ability to set brightness, contrast, etc in home assistant and this is what I observed.

Initially picture_settings contains all four brightness, contrast, backlight and color properties. But once I called set_current_picture_settings with a dict containing only backlight, the picture_settings now only contains the backlight property.

Is this expected? How to ensure that all the properties are correctly reported even after setting one of the properties optionally?