When trying to change a text input on a screen from a custom list (referencing the current record), you will find it not possible at a list level. Only option is to reference the logged in user, Instead you will have to…
put the action on a component or group within the list.
Strange but true.
I have submitted a ticket and it is considered a limitation for now. Writing it here to save somebody an hour of head scratching and testing - yeah that’s what I did.
Thanks to Kyle at Adalo support for a quick Answer.