you could try even if is "dangerous" this format
isBoolean
===> blank subevent ==> always triggering action
===> subevent trigger once ==> some 1 time action everytime when boolean is true(whenever bolead is true... spawns 1 item for example... the item can be spawned multiple times if the isboolean toggles on off)
as doop said... might cause confusion and code breakage... if u don't keep proper track of it... just keep it at the end of ur code.
personally i didn't had any issues with this format, unless i added random conditions on top with isBoolean