void AppendFiles(VectorMap<String, ClipData>& clip, const Vector<String>& files)
{
	WString wfiles;
	for(int i = 0; i < files.GetCount(); i++)
		wfiles << files[i].ToWString() << wchar('\0'); //Fix
//Bugs		wfiles << files[i].ToWString() << "\0";
.....

#include <Core/Core.h>
#include <CtrlCore/CtrlCore.h>
using namespace Upp;

CONSOLE_APP_MAIN
{
	VectorMap<String, ClipData> clip;
	Vector<String> files = { "11.bmp", "22.bmp" };
	AppendFiles(clip, files);
	Vector<String> vs = GetClipFiles(clip.Get("files").Render());
	DUMP(vs);
}
//Before Fix
DUMP(vs) 
vs = [11.bmp22.bmp, 攀牆敥牆敥ｺ牆敥牆敥牆敥]

//After Fix
DUMP(vs) 
vs = [11.bmp, 22.bmp]