Aplha Lock of splited layers goes away if we change color space of image through Image> convert color space.

When we split layers ( Layers > Split Layers)  from a GMIC output layer ( colorize interactive) and then convert it into CMYK color space. the alpha lock of the splited layers goes away.

Reproducible: Always

Steps to Reproduce:
1.open an image with GMIC output layer ( or image having random color spots on a layer )
2.Split the layer( Layers > Split Layers) with alpha lock everynew layer check box ticked.
3.Then convert the image color space to some other color model e.g. CMYK

Actual Results:  
The alpha lock from split layer is removed

Expected Results:  
Alpha locks of the layers should be intact