Convert linework and walls to slab will cause blank slab style in properties

If you use SLABCONVERT and create a slab from a polyline or wall (SlabConvert/ Slab tool right-click > Apply tool properties to > Linework and Walls) the information about the slab style will be blank in the Properties:Solution

One workaround is creating a space using the line work, and then create a slab using the space.
Additional workaround is when applying standard style to the polyline, right click on another slab style rather than standard in tool palette, and apply to the created slab, it succeeds. Then change the slab style to Standard.