Smoothing modifier clothes mess up when DAZ reopened

Hi DAZ experts,

I've been having this problem for a while, whenever I load a piece of clothing that's originally for V4 on G3F using Wear Them All, and then I apply a smoothing modifier, everything's fine. However, when I close DAZ and reopen it and load the scene, the clothes now have this weird protrusion (like in the attachment) that can only go away if I turn off smoothing modifiers, or load a new piece of the same clothing and put a smoothing modifier on. These two ways are unfavorable of course, so how I do avoid having the original pieces of clothing from messing up? It only affects clothes that were fitted using Wear Them All.