Tue Jun 06, 2023 11:05 pm
Ah, it is indeed a bug, and I've managed to reproduce it.
I've never encountered it before, because I use the legacy setting for cut and paste ("Always perform copy and paste on selected nodes" is turned on in User Preferences, Color Page). This means that CTRL-V can only paste a single node, never the full clip grade.
You probably have this option off, which means that CTRL-V pastes the full clip grade when you have the thumbnail area in focus, or just the node when you have the node tree panel in focus. The former seems to ignore the Keyframe Mode (copying sizing data even when Color mode is selected). Middle clicking or applying a grade always take the KF mode into account.