Bard Ult Misfire and other bard related bugs

As the title reads, I encounter a bug pretty often playing bard. The bug is conditional and only appears to occur when I am looking to cast my ult in an area, but I decide not to, and cancel the spell (I don't use quick cast, so its the ult animation I guess idk what to call it exactly) So once I've canceled the ult and I no longer see the animation the next place I select to move to will cast the ult there. Further notes: It also appears to only happen when I was looking at a location to ult with my screen unlocked, once I have decided not to ult I will lock my screen again.

other secondary bugs, which may not be bugs.

1. When entered into a magical journey it is possible to be knocked up and out of the wall moving you back out of the magical journey.
2. When entered into a magical journey Vayne can pin you against the wall making you return to post magical journey.

I suppose my secondary bugs probably aren't bugs but I'm just curious if you should be immune from certain forms of cc in a magical journey? Perhaps knock ups, since a knock up shouldn't affect your movement other than up. But definitely the first bug is an issue I've encountered multiple times in multiple games.