OS: Windows 10 64 bit
iTunes version: 12.5.1.21 64 bit

STR:

1. Search for a song in Apple Music. The iTunes Store will probably do it too.
2. Press f6 to move into the web view.
3. Keep pressing (or even hold) downArrow.
   • Expected: NVDA should navigate through the document.
   • Actual: Eventually, iTunes freezes, taking NVDA with it.