Page order

I don't know if this is a kind of black series for me or what...

I cannot simply drag the page tab (on  the bottom bar) to change it's order. Is there any other way to set the actual order of all pages? The only way I managed is to get the page tab with right mouse button and then drag it. It's clearly some bug because after dropping the context menu shows (this is normal with right button), so this method seems accidental.

Unfortunately the help is written or indexed such way that I cannot quickly find any good information about page order, even if my help is in my native language.