Playbeat 4 copy/paste mode: All/Selected please?

When using copy/paste mode, it appears that the All/Selected buttons have no effect on it.

This prevents being able to simply copy, for example, just one section of the hi hat line across the grid.

I have to copy across that section of the whole beat, and then re edit all the other hits, just to get my hi hats correct.
I use the example of hi hats because this element is one which tends to have the most hits with different velocities, which is a chore to paint accurately across a 4 bar pattern.

Request to implement “All/Selected” for copy/paste mode.