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iOS: scroll down --until stops before the end on SwiftUI List (0 passes) and ScrollView #4216
Description
On iOS, scroll down --until '<selector>' gives up on SwiftUI lists that plain scroll down scrolls through fine.
Repro: https://github.com/antFrancon/agent-device-scroll-until-repro (./repro.sh [version]). It's a one-file SwiftUI app showing the same 64 rows three ways, with one .ad per way, each running scroll down --until 'id="row-60"'.
| Replay | Rows in | Result |
|---|---|---|
list.ad |
a List, pushed |
fails after 0 passes: "scroll down reached the end of the scrollable content … without id="row-60" becoming visible" |
sheet.ad |
the same List in a .sheet |
fails after 0 passes, same message |
scrollview.ad |
a ScrollView + LazyVStack, pushed |
fails after 3 passes, same message, with rows 53–63 still below |
Plain scroll down reaches row-60 in all three: 7 flings for the list, 8 for the sheet, 4 for the scroll view.
Likely cause for the List: it reaches the snapshot as [collection] with no [scrollable], so --until sees no scrollable content and never swipes (scroll_until_edge_reached, passes: 0, nothing dispatched). The ScrollView is [scroll-area] [scrollable], but end detection still trips one pass early.
Expected: --until keeps scrolling until the selector is visible or the content truly stops moving.
Seen on: agent-device 0.21.28, 0.21.36 and 0.21.37-nightly.20261103.128 (identical results) · iOS 26.5 simulator, iPhone 16 · Xcode 27.2 (27B52) · macOS 27.0 · Node 22.22.1
Activity
thymikee commentedon Nov 5, 2026
Triage: bug; actionable without more input from you. The
--untilpath currently treats a missing scroll container or missing hidden-content evidence as end-of-content before dispatching a gesture. That matches the zero-pass failure you describe. The fix needs to cover the pushed List, sheet List, and LazyVStack cases, and distinguish an unproven edge from content that has actually stopped moving. Thanks for the version matrix and the three-case repro.