diff --git a/quickshell/Modules/DBar/DBarBody.qml b/quickshell/Modules/DBar/DBarBody.qml
index da8659b43..d6f5cea51 100644
--- a/quickshell/Modules/DBar/DBarBody.qml
+++ b/quickshell/Modules/DBar/DBarBody.qml
@@ -744,7 +744,9 @@ Item {
     readonly property real barSurfaceThickness: Theme.px(effectiveBarThickness + surfaceSpacing + ((renderBarConfig?.gothCornersEnabled ?? false) && !hasMaximizedToplevel && spansEdge ? _wingR : 0), _dpr) + _shadowBuffer
     readonly property bool islandSheetOut: islandHost?.sheetOut ?? false
     readonly property real islandSatelliteShadowBuffer: isIsland && islandSatellitesEnabled && !islandSatelliteBackground ? _shadowBuffer : 0
-    readonly property real hostThickness: isIsland ? Math.max(islandHost?.hostThickness ?? 0, islandStripThickness + islandSatelliteShadowBuffer) : Math.max(barSurfaceThickness, islandSheetOut ? islandHost.hostThickness : 0)
+    // A grown layer surface jumps to its new origin before the client draws at the new size, so a far-edge host never grows for the sheet.
+    readonly property bool islandReservesSheet: !!islandHost && (axis.edge === "bottom" || axis.edge === "right")
+    readonly property real hostThickness: isIsland ? Math.max(islandHost?.hostThickness ?? 0, islandStripThickness + islandSatelliteShadowBuffer) : Math.max(barSurfaceThickness, islandSheetOut || islandReservesSheet ? islandHost.hostThickness : 0)
     // The host reserves the expanded island's height, so sliding by it would move a compact island off-screen within a frame.
     readonly property real islandCompactThickness: Math.max(islandStripThickness + islandSatelliteShadowBuffer, (islandHost?.outerGap ?? 0) + (islandHost?.compactThickness ?? 0) + (islandHost?.shadowPadding ?? 0))
     readonly property real hideSlideThickness: isIsland ? islandCompactThickness : barSurfaceThickness