Misleading visual on Nightbringer Yasuo's Windwall

"There's a windwall between me and my ally. I'll just wait until it's gone and then send The Ball" poof "WHAT?" https://youtu.be/hrH0NMdxX9k And again but in slowmo: https://youtu.be/SxGAARA6t48 If you watch it frame-by-frame the windwall is COMPLETELY invisible when The Ball hits it, but deletes it anyway. Yasuo's windwall should not be deleting projectiles when the "wind" is gone, regardless of whether or not there's still an imperceptible red line on the ground. Which there wasn't at the time of impact. This has happened twice already, and both times with this skin.