Puppet Arms Stiff - Barely move when dragged

Hello!

About a year and a half ago I created a Puppet in Character Animator 2021, and it was working great.

Today for the first time in a long time I've loaded it up and tried to replay some of the pre-recorded animations, but the arm movements are really stiff and barely moving, either when I drag them with the mouse or with the pre-recorded wave animations, which previously worked great.

I'm not sure where to start without tearing the puppet apart and hoping someone can direct me to some feature that potentially was introduced in the last year and a half that may account for this behaviour..

Here is how the arms are rigged, for refrence:

Not having kept up with the version updates over the last year or so, have there been new features added that may account for why the arms now behave this way?  Formerly properly waving, now they move maybe 5-10 pixels tops when dragged.

Thanks in advance for any leads!