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Faulty adapters aren't uncommon. I've had a few over they years, mostly mass produced with small machining errors and assembly errors highly possible., it could be shorting out a couple of the metering contacts it's not supposed to be shorting out making the camera inoperable.
Best with these things not to persist for fear of bigger, more expensive problems.
I learnt the hard way recently (pre Christmas) fitting a genuine old Nikon macro extension tube from my old 35mm film cameras onto my Nikon D810. I've used them numerous times in the past with good results but this one time it felt tight fitting the thing.
A $47 part which ended up as a $550 repair and 7 weeks without my camera.
I recall it feeling tight fitting it but having used the things so many times in the past I ignored it, till I didn't....
Silly question I know but you don't know anyone locally with an identical adapter (local astronomy group perhaps) you could borrow to test?
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