Somewhat similar. I just did example.com/folder/ to example.com/file/ redirect so that all URLs remained the same except the folder names. This was part of a software upgrade. Wow, Google picked up on the redirect within a week to ten days. Yes there was a period where I dropped out but within ten days everything was pretty much stablized. To make things even more fun and keep me awake at night there were even a couple days when the site was entirely down- poof! Gone from the Internet! Yet even with the crawl errors the site rankings still returned. Same with Yahoo/Bing.
There was a moment during all the bugginess when I panicked and felt sick in my stomach, existential-type nausea, and almost vomited. My kid heard me gagging in the next room and said, "Heh, daddie's coughing up a hairball!"