diff --git a/src/components/node/NodeImageSlideBlock/index.tsx b/src/components/node/NodeImageSlideBlock/index.tsx
index 20df25b1..e4e846a6 100644
--- a/src/components/node/NodeImageSlideBlock/index.tsx
+++ b/src/components/node/NodeImageSlideBlock/index.tsx
@@ -79,15 +79,16 @@ const NodeImageSlideBlock: FC<IProps> = ({ node, is_loading, updateLayout }) =>
     if (!wrap || !wrap.current) return;
 
     const { width } = wrap.current.getBoundingClientRect();
+    const fallback = (width * 9) / 16;
 
-    if (is_loading) return setHeight((width * 9) / 16);
+    if (is_loading) return setHeight(fallback);
 
     const selected = Math.abs(-offset / width);
 
-    if (!heights[Math.round(selected)]) return setHeight((width * 9) / 16);
+    if (!heights[Math.round(selected)]) return setHeight(fallback);
 
-    const prev = Math.max(heights[Math.floor(selected)] || 320, 320);
-    const next = Math.max(heights[Math.ceil(selected)] || 320, 320);
+    const prev = Math.max(heights[Math.floor(selected)] || fallback, fallback);
+    const next = Math.max(heights[Math.ceil(selected)] || fallback, fallback);
     const now = prev - (prev - next) * (selected % 1);
 
     if (current !== Math.round(selected)) setCurrent(Math.round(selected));