I don't know how the camera detects the presence of cards but if it is a mechanical switch then it is plausible that the camera tries to read the card from that slot until it hits the time out limit.
I imagine that what you are trying is such a rare case that it slipped pass QA.
Maybe the camera can tell there is a card in there so it gives it a few seconds to see if it's going to respond or not.
Or maybe it's trying to format it. When I put a new 32GB card in my camera for the first time it took a few seconds to format it before it came on. Your camera might detect the card, can't read it so try to format it. And obviously fails.
Or maybe it's trying to format it. When I put a new 32GB card in my camera for the first time it took a few seconds to format it before it came on. Your camera might detect the card, can't read it so try to format it. And obviously fails.
Yep, that's what I'd go with as a reasonable theory. You're telling it something is there, even though it clearly isn't. There are many, many other places you can put the micro-SD adapter (in your pocket, in your bag, taped to the side of the camera) that won't screw up the operation of your $3500 camera; seems silly to trade a minor convenience for losing the start-up time