-e: across browser copy & pasting via cmd-key shortcuts is not working in all cases

-repro:
--open and build attached project/scene
--type something into the either input field
--try to copy that with cmd+c or +x
--NOTICE it cuts instead of copy and also the c or x is written
--try to paste it
--NOTICE it pastes it or not and the v is written

--full list of results linked in google doc below