Clothing material won't show in a rigged/blend shaped cloth attached to a body

Many times when I import a new rigged character I receive an error that the material needs morph support and shows without materials when running animations . But eventually Unreal will calculate them.
But when trying modular clothing where I change the clothing of a character this won’t happen. I need to assign the materials to te body of another characters to be processed corrected. Any solution to force Unreal to process them?