Dependent selects don't showing selected values in edit form

Hey Guys, I'm working on a blog with Filament 3, and in my ArticleResource,in my form I've got 2 selects: -the first one to select a category (Continent) -the second one to select a subcategory(country) that belongs to a category selected in first select I've implemented several methods that work like a charm in create form but not in edit form : the selected values are not displaying... :-(( I don't understand what I'm doing wrong...I'm totally lost... Could you help me please ? I send you a print screen of one of my 4 methods that i've tested so far, and another print screen of a part of my MLD. Thank you ! Have a nice day !