I can confim I’m seeing issues with copying/pasting ‘Get Relevant Anim Time Remaining’ nodes in 4.19.
I copied and pasted a State Machine from inside an Anim Graph into another Anim Graph.
Inside the state machine were a number of states and a number of transition rules.
In the pasted version, the ‘Get Relevant Anim Time Remaining’ nodes in the transition rules stopped working until I deleted them and re-added them.