[Help] IGCN S9 E2

All characters do not die with only a shield. A +1 shield or a +15 shield will not die. Game version is IGCN season 9. In the itemlist.xml file, changing the shield's defense and defense rate to 0 will not change at all. Please let me know how to fix it.

What kind of Shield?
Socket?
do they use Set?
When you hit them, do you see Miss Damage or 0 Damage?