Procedural Sound Wave playback issues upgrading to new Audio Mixer

We’re updating our plugin to work with the audio mixer, and hit a problem with procedural sound waves not rendering beyond the first buffer. It seems that setting bLooping to true is necessary for USoundWaveProcedural-derived classes with the audio mixer?

Can someone clarify this, and if there are any related considerations? Up to now it has always been set to false and worked as expected. This comment in the code didn’t help matters.