Hooktheory doesn't play examples in Brave browser

Windows 11

Just purchased Hooktheory I & II, looking good. However, the the list of song examples in 1.1 The Major Scale isn’t playable in Brave browser on Windows 11 (even with shields down). It is playable in Edge browser. Both are chrome based and up to date. It’s also playable on Brave for Android. I prefer Brave for its security benefits. Any chance of a fix? See attached screenshot from Brave (Edge shows the keyboard OK and play button works).

All other examples seem to play OK.