catch exception

texthook.js

@@ -1805,10 +1805,17 @@ function update(event)
                 textNode = caretdata.offsetNode;
                 offset = caretdata.offset;
                 
+                try
+                {
                     let range = mydoc.createRange();
                     range.selectNode(textNode);
                     hitrect = range.getBoundingClientRect();
                 }
+                catch(e)
+                {
+                    hitrect = undefined;
+                }
+            }
             // sticky mode and android need to break out on parent detection
             if(ele && !ele.contains(textNode) && is_sticky())
             {