Thank you! Your explanation about .listRowSeparator(.hidden) being row-specific (and not global to the entire List) was exactly what I needed. I was only applying: .listRowSeparator(.hidden) .listSectionSeparator(.hidden) to the List itself, assuming it would hide all separators automatically — but as you pointed out, SwiftUI requires the modifier to be applied on every row. What I did to fix it I added: .listRowSeparator(.hidden) directly to each transaction row inside my custom content view: ForEach(...) { ... } .listRowSeparator(.hidden) Then I also added it to: the header Section for each day the top block inside ReportMensileView (statistics + month picker + total + picker) This ensured that every row rendered by the List has the separator explicitly hidden. Result All the “mysterious horizontal lines” immediately disappeared, without breaking: native List scrolling swipe-to-delete custom rounded card backgrounds grouped Sections Everything now renders perfectly clean. Thanks again for pointing me in the right directio