diff --git a/ui/dr-ui/ui/library.slint b/ui/dr-ui/ui/library.slint
index 0475cc9..bde934d 100644
--- a/ui/dr-ui/ui/library.slint
+++ b/ui/dr-ui/ui/library.slint
@@ -1771,6 +1771,13 @@ export component LibraryGrid inherits Rectangle {
     // Reported out so Rust can place month headings: a heading belongs on a
     // cell that begins a row, and only the grid knows how wide a row is.
     changed columns => { root.columns-changed(root.columns); }
+    // And once on creation. `changed` reports a change, and the first
+    // evaluation is not one — so a grid built after the window has already
+    // settled at its size never said how wide it was, and Rust went on
+    // placing headings for the one column it had been told about at
+    // start-up. Every month then began a row and was announced wherever
+    // its first cell fell, mid-row included.
+    init => { root.columns-changed(root.columns); }
     property <int> row-count: ceil(root.cells.length / max(1, columns));
 
     // --- while a pinch is happening, and just after -----------------------