Found a bug ! Concerns split to array option in text manipulation where if you set to split to a global array, then create a local array and trying to switch to split to this local array it would not let you.
(MacroDroid 5.26.4 Pro)
I'm making a bug report
Edit : it works properly in 5.26.7 but I found something else... Unfortunately there is a 420 character limit, so I can't put it here...