Pasting multiple items to tracks pastes them on last touched track even if that is part of a track selection (like if you visual track select from the top down it pastes things on the bottom track). Default reaper behaviour will be the best way around this perhaps, with pasting on topmost selected track?

It also seems to be the case that selecting only works when visual timeline mode is triggered after visual track, so you cannot select if you use visual timeline first.

I am also unable to run actions on the selected items like "cut" if I selected them with the mouse. Perhaps related