Audio

• Animancer can play Timeline assets containing audio tracks which normally work fine.
• But if the Animator.updateMode is set to "Animate Physics" (before entering Play Mode) then the audio does not work.
• There is currently no known workaround for this issue. If you want audio from a Timeline, you can't use Animate Physics mode.
• Bug Report Case Number: 1279412
  • Fix In Review for 2022.1

Previews

• When Previewing a Timeline Previewing, using the Play button causes the Unity Editor to crash as soon as the Previous Animation starts fading into the Timeline.
• Using Timelines in Play Mode or Runtime Builds works fine.
• Setting the preview time by clicking in the TimelineGUI (the bar where Animancer Events are displayed) also works fine.
• Bug Report Case Number: 1282046
  • Fixed in Unity 2021.2.

Root Motion

• Root Motion doesn't seem to work properly when transitioning into a Timeline. This is presumably because they're designed mostly for things like cutscenes where you always want a character to go to a specific spot in the scene.
• This forum thread has more detail and a possible workaround suggested by a Unity developer.