diff --git a/src/components/map/MapNotes.js b/src/components/map/MapNotes.js
index 4efacf9..1f31893 100644
--- a/src/components/map/MapNotes.js
+++ b/src/components/map/MapNotes.js
@@ -69,13 +69,15 @@ function MapNotes({
     }
 
     function handleBrushMove() {
-      const brushPosition = getBrushPosition();
-      setNoteData((prev) => ({
-        ...prev,
-        x: brushPosition.x,
-        y: brushPosition.y,
-      }));
-      setIsBrushDown(true);
+      if (noteData) {
+        const brushPosition = getBrushPosition();
+        setNoteData((prev) => ({
+          ...prev,
+          x: brushPosition.x,
+          y: brushPosition.y,
+        }));
+        setIsBrushDown(true);
+      }
     }
 
     function handleBrushUp() {
diff --git a/src/components/note/Note.js b/src/components/note/Note.js
index 884757e..d743dfa 100644
--- a/src/components/note/Note.js
+++ b/src/components/note/Note.js
@@ -104,17 +104,22 @@ function Note({
         (_, i) => i + Math.ceil(noteHeight / 10)
       );
 
-      return sizes.reduce((prev, curr) => {
-        text.fontSize(curr);
-        const width = text.getTextWidth() + notePadding * 2;
-        if (width < noteWidth) {
-          return curr;
-        } else {
-          return prev;
-        }
-      });
+      if (sizes.length > 0) {
+        const size = sizes.reduce((prev, curr) => {
+          text.fontSize(curr);
+          const width = text.getTextWidth() + notePadding * 2;
+          if (width < noteWidth) {
+            return curr;
+          } else {
+            return prev;
+          }
+        });
+
+        setFontSize(size);
+      }
     }
-    setFontSize(findFontSize());
+
+    findFontSize();
   }, [note, noteWidth, noteHeight, notePadding]);
 
   const textRef = useRef();