I was playing against a monarch deck and he used Brain Control on a defense mode Number 41 Xyz on my field. Ran some tests after the game, this is what i found:
1) Defense position 41 can be targeted by brain control even though Xyz monsters cant be Normal Summoned/Set.
2)Glitch only seems to apply to number 41. Tested some other Xyz monsters as a control and Brain Control acted as normal.
Pretty sure this is a bug, but feel free to give me a good slap on the wrist if this is some obscure ruling I missed. Thanks.

Did you check if it's Brain Control (Pre-Errata)?

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No need to, it was an actual bug. It should be fine now though, the patch has already been approved.

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Idk is this right place to post this here but i notice Artifact Vajra[69304426] have small mistake in text. In one of line say: Destroy all cards in your Spell & Trap Zone.