Each layer has its own unique ID. By deleting a layer and adding a new one, the layer IDs will no longer match between the library objects and the design file objects, which is why the overrides are reset.
This also affect resetting overrides.
Each layer has its own unique ID. By deleting a layer and adding a new one, the layer IDs will no longer match between the library objects and the design file objects, which is why the overrides are reset.
This also affect resetting overrides.