Unintended action duplication in PM editor

[kavery]

Playmaker 1.9 v.19  Unity 2018 or 2019.

I'm getting some strange but consistent PM editor behavior.

For example if I copy an action and then delete another action, when I paste it pastes the deleted action. It's also really easy to accidentally duplicate an action, or sets of selected actions by mistake, just by clicking on the panel (in an effort to select a different action).

What could possibly be up? It's been leading to some errors in the logic when it happens unnoticed.   

Thanks for the help.

[DanielThomas]

It's a known problem and has been reported before, hopefully it gets fixed sooner than later.

Not sure if it had consistent reproduction mentioned when reported though.