Thanks for reporting this issue. Could you please share the scenario Fla, so that it will be easy to repro the issue.
Could you give me an email where I can provide download links? I have 2 different spritesheets where this is happening.
These spritesheets are from a game currently on the iOS and Android stores (The Tapping Dead), so their contents are sensitive for us. But if we can help to resolve this issue we'll be happy to provide them.
Could you please provide the media on any secure file sharing site.
I have exactly same problem. I can not understand why when rotation checkbox is blocked it happens.