Bug in napari window: changing mask colors in the label segmentation mask.

[KorenMary]

Description:
After making changes to the instance segmentation mask by adding new objects, the colors of existing objects in the label mask are being reset to their initial colors.

Steps to Reproduce:
Open the napari window in dcp.
Add a new object to the instance segmentation mask.
Manually change the color of the added object in the label mask.
Add another new object to the instance segmentation mask.
The color of the first object will reset to the initial color.

Expected Behavior:
The color of the objects in the label mask should persist even after adding new objects to the instance segmentation mask.