Paste Expression Errors

Hey Folks… Can anyone explain why it seems some entries on an Action are impossible to paste an expression into? It seems to be the ones that have the Paste Before and Paste After Actions… and however I paste, I just get this error:

Paste%20Expression%20Error

Thanks!
Antony.

Does anyone have any thoughts about this? It seems like a bug to me! :frowning:

did you figure it out? I see the same issue