faulty arduino pro micro clones?

hi all,

i recently bought some arduino pro micro clones from aliexpress. after
happily soldering them into my boards i noticed that the arduino was
behaving really strangely. after closer inspection i noticed that the
crystal markings are different from other clones, as well as the markings
on the atmel mega32u4 chip itself.

did anybody had a similar experience with those arduinos from aliexpress?

bests,
const

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