Evolving Kha'Zix's abilities animations

The bug occurs when you choose which ability you want to evolve, then immediately click "B" to recall and the evolving animation will be skipped.

The bug can happen at any time, after clicking on which ability you want to evolve, you must very quickly click "B" (for recall) or the bug won't happen.

The bug can happen always as long as you click recall right after you evolve.

Even clicking B after 0.25 maybe won't produce the bug.