I might have suggested to build the crown out the thickness of the tile and continue the crown around the shower over the tile so you would not get the finish you have.
Crown molding around tile shower.
Or maybe cut out some of the bottom of the crown molding to fit around the tile.
Provided they have coped the crown this would be a easy process as you would only have to remove the installed pcs at the corner and above window.
Transitioning crown molding between tile and drywall.
Cut a strip of wood thinner than your crown moulding and the same width as your sheets of tile.
Using a piece of crown molding as a reference nail the board to the wall slightly above the bottom edge of the crown.
I regret not placing crown molding around the shower because it has created an open transition at the juncture picture below.
If you were to search for this problem online you would find people have tried every single one of the above for solutions to this same bathroom problem.
Crown molding abutts tile.
Dec 29 2018 explore debbie kellett s board crown molding in bathroom on pinterest.