I have an HDA with a Stash node in it. The node is set to editable and it's Stash Input button was dragged into a custom button's channel link, in the HDA's type property panel. This setup doesn't work when loading a scene or right after adding the HDA instance. If I dive into the HDA and click on the Stash Input button once then my button starts working. (Well, at least until the next scene load.)
Is there a more reliable solution for this?