Layout container inheritance is broken in the Live copy

Hi,

The inheritance of the layout container in the Live Copy is breaking for some reason due to which the sync between Language master and Live copy is gone and any changes made in LM is rolled out to LC is out of sync.

I suspected the authors would have made direct updates in the components of LC which could be the reason of the broken inheritance but they claim they didn't and all other components inheritance is intact in the Live Copy, it is just the layout container inheritance that's broken.

Any thoughts why layout container inheritance could break ?