No, I mean... It seems like a growing trend among changelings is to not do well when it comes to matters of a clandestine nature. See: the canter lot invasion, the ENTIRETY of clan abberans, Cancer not being able to detect Vinylbot sneaking up on her, etc.
Cancer: Actually, as far as I can see the Canterlot Invasion, whilst an incredibly dumb idea, was completely successful until the defenders cast this one spell that chucked an entire army halfway across the continent.
The Abberans... Well, they are idiots. Clan Ostracoda certainly doesn't want to see a second attempt at integration go wrong on our watch. That said, they aren't failing to pull off sneaky stuff. Their failures are in completely different areas.
And you can shut the crick up about the ninja robot, I was browsing the internet. My attention was elsewhere and it's not a big deal I got a little startled.