On v 1.05 the chest copy does not always work. It does not give an error message or floating text, it just doesn't copy. I was able to narrow it down to a few lines of code. When I removed the following lines from the script file "copy-chest" it works ever time:
if pdata.copy_src then
-- Used for same keybind
return
end

I did update my keybinds, but they are not the same (CTRL + Shift + C, CTRL + Shift +V)

Hmmmmm, I might have to revert the change I made and just not support same keybinds at all.

ctrl-shift-C is a duplicate of a hotkey in the picker pipe tools.
it toggles clamping when trying to move the contents of chests.

having separate hotkeys requires to remember more, but is easier to use, with no confusion about whether some data is stored and whether the next use of the hotkey will cut or paste the contents. but the info page of this mod here on the mod portal still says to use control-V for both source and destination !?