Editor locks up on Windows 7 when attempting to play media

Regression - was introduced in CL 3256177.

Doesn't occur on Windows 10, only verified that with one user though.
Possibly related to [Link Removed], though I'm on an AMD card.

If you enter one of the other two triggers before entering the leftmost one, the editor will not lock up, but media doesn't play either.

CrashReportClient never appears, even after restarting the editor.

1. Open QAGame in the Editor
2. Open the map QA-Media_TrackSwitch
3. PIE, then run into the leftmost trigger without entering either of the other two triggers first

Result: Observe that the editor locks up

Expected: For the media to play