Weird Random Frozen Timeline issue

I'm using timelines that are generated at runtime that contain animation and audio synched to the dsp clock and am getting a a strange issue that happens randomly in editor and also on device:

Every once in a while the timeline will get stuck; In the editor, if I select the gameobject in the PlayableDirector and inspect the Timeline, the play button does nothing; you can scrub the timeline and it updates the animation on the referenced gameobjects but that is it.

I added a custom component that exposes the public API of the PlayableDirector and none of the methods does anything.

The playableDirector is using the DSP clock to update and the DSP time is updating.

If I press pause and unpause in the editor it "fixes" it so that the animation.

On device it seems to happen frequently after waking up after the device has gone to sleep

Has anyone else experienced this in Unity 2017.4?