#3208 - Fixed structure disappearance and app crash when pressing on …

…'Layout

packages/ketcher-core/src/application/render/restruct/reatom.ts

@@ -708,24 +708,28 @@ function buildLabel(
   let label: any = {};
   label.text = getLabelText(atom.a);
 
-  if (label.text === '') label = 'R#'; // for structures that missed 'M  RGP' tag in molfile
+  if (typeof label === 'object') {
+    if (!label.text) {
+      label.text = 'R#';
+    }
+
+    if (label.text === atom.a.label) {
+      const element = Elements.get(label.text);
+      if (options.atomColoring && element) {
+        atom.color = ElementColor[label.text] || '#000';
+      }
 
-  if (label.text === atom.a.label) {
-    const element = Elements.get(label.text);
-    if (options.atomColoring && element) {
-      atom.color = ElementColor[label.text] || '#000';
+      const { previewOpacity } = options;
+      label.path = paper.text(ps.x, ps.y, label.text).attr({
+        font: options.font,
+        'font-size': options.fontsz,
+        fill: atom.color,
+        'font-style': atom.a.pseudo ? 'italic' : '',
+        'fill-opacity': atom.a.isPreview ? previewOpacity : 1,
+      });
     }
   }
 
-  const { previewOpacity } = options;
-  label.path = paper.text(ps.x, ps.y, label.text).attr({
-    font: options.font,
-    'font-size': options.fontsz,
-    fill: atom.color,
-    'font-style': atom.a.pseudo ? 'italic' : '',
-    'fill-opacity': atom.a.isPreview ? previewOpacity : 1,
-  });
-
   label.rbb = util.relBox(label.path.getBBox());
   draw.recenterText(label.path, label.rbb);