The luster of Hawk Moth's suit changes significantly between episodes for no apparent reason.
The Butterfly and Peacock Miraculous are disproportionately more powerful than other Miraculous, as they sense negative emotions, transmit messages, can be activated without a vocal command, and on multiple occasions are shown to replicate the abilities of other Miraculouses including the Ladybug, Cat and Rabbit, yet these are said to be the most powerful.
Lucky Charm is able to lead Ladybug to Master Fu and to Dark Owl's akumatized object, yet n one thinks of using it to find the holder of the Butterfly Miraculous.
When Ladybug de-evilizes akumas, she says "bye bye, little butterfly" despite knowing that the one who sent it is called Hawk Moth.