If you shoot Wand Magic, you can't fire a sword beam until said magic is gone. After you fire a sword beam, it disapears after the wand magic appears on the screen.
Sword beam and wand magic don't agree
....That's no bug. I can tell you for a fact, THIS IS INTENTIONAL. Heck, the code is MADE to make that happen. So no, not a bug. I heard it happens in the original TLoZ, too.
That's right. In the future, if you find a bug that seems to be in a lot of versions, old and new, you should probably check a real version of the game to make sure it's actually a bug.
...on that note, if you summon a whirlwind, it will turn into a flame a split second between hitting the other side and dissapearing. This is also normal and from the original.