The patch 1cc20d181bdee1131bf2eb191e7f8fe4e4927e03 introduced a nested dialog inside the FileDialog, which contained a Label as its contentItem. This would cause a binding loop, since the dialog would add itself as an implicitSize listener to the Label, and attempt to update it's own implicitSize twice, when the Label's text changes. Fix the issue by giving the dialog an explicit width. When the overwriteConfirmationDialog had an animation (which the Material Dialog has), it was possible to enter QQuickPopupPositioner::reposition(), when its parentItem (the fileDialogListView), no longer had a window. Add a check to return early, in those situations, to avoid a crash. Fixes: QTBUG-127619 Change-Id: I0324a2a470f237ba1a65a95d8bea7fa50166d756 Reviewed-by: Mitch Curtis <mitch.curtis@qt.io> (cherry picked from commit 036beb99621781b406b70e6c31841215393e38ea) Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org> (cherry picked from commit ee1fa04814d22565685d5d0fe2ccd5773fcb3276) (cherry picked from commit 85f768102226dafa98c068d3a00b971a0559140f)