rig from guide and remove all animation any type do not mix

Here is something to remember if you are using Rigs from Guides. These rigs use Scripted Operators to control the upvector - the scripted operator (as well as any constraints or expressions) will be removed if you use the Remove Animation > from All Parameters, Any
Animation Type command from the Animation panel. Which will result in the rig no longer behaving as expected - i.e. if you use the Remove all animation command and then try to rotate the chest, the upperbody will not follow.

I was not able to recreate the scripted operator and had to regenerate the rig from the guide.

To avoid this, only remove animation from the specific transform (position or rotation) rather than all!