[Android] Fix CarouselView Issue23291 and Issue29216 test regression on candidate branch#34996
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kubaflo merged 3 commits intodotnet:inflight/candidatefrom Apr 17, 2026
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Root Cause
During CarouselView startup on Android,
UpdateFromPositionruns before the carousel is fully initialized (_initialized = false). It sets_gotoPositionduring an initial scroll attempt, but since the layout is not ready, the scroll never completes. This leaves_gotoPositionstuck at a non-negative value.Earlier, this was unintentionally handled by an unconditional
_gotoPosition = -1inUpdateFromCurrentItem, which cleared the stale state. PR #34570 removed that line (to avoid breaking the guard during animations for #29544), exposing the issue.As a result,
_gotoPositionremains stuck, causing all subsequentUpdateFromPositioncalls to fail the_gotoPosition == -1check and skip scrolling. This leads to timeouts in tests likeIssue23291andIssue29216, as the carousel never moves to the requested position.Description of Change
Updated the guard condition in
UpdateFromPositionby applying the_initializedcheck only to the_gotoPositionassignment, ensuring it is set only after initialization while leaving the rest of the logic unaffected.This prevents premature or stale
_gotoPositionvalues during startup and preserves the existing scroll behavior, keeping the change safe.Issues Fixed
Fixes regression introduced by #34570 :
Issue23291TestIssue29216CarouselViewScrollingIssue on Candidate branch.Tested the behaviour in the following platforms