Hi @luffy2022#1810! As Zeph said, we need more information in order to determine what specifics you are reporting. Thanks!
As a simple test before making that reply, I went to WoD and checked my ilvl. I unslotted my Trans Plaguefire and the ilvl dropped. It returned to the previous correct level when reslotted. Wasted a little gold, but was the best way to check without any details.
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At the very least, where did you do the test, how many enchantments did you test and which specific ones were they?