Previously it was very easy to drag tabs out of Opera, and either:

1. Attach them to an existing Opera window by hovering over the tab bar and dropping the tab where you wanted it.
2. Or open a new window by dropping them anywhere that wasn't on the top tab bar.

Now it's impossible to open a new window without creating a blank area on the screen first so I can drop the tab outside of Opera. It basically forces option #1 every time, regardless of where you drop the tab, and is a frustrating loss of functionality.

It used to be so easy to use this to turn a tab into a new window on its own, and I can't find any way to disable this new feature and revert to the old behaviour. I hoped that disabling side-by-side mode would fix this, but it's made no difference.