diff --git a/.changeset/fix-swipe-back-direction-lock.md b/.changeset/fix-swipe-back-direction-lock.md
new file mode 100644
index 000000000..8ca3ab402
--- /dev/null
+++ b/.changeset/fix-swipe-back-direction-lock.md
@@ -0,0 +1,5 @@
+---
+"@stackflow/react-ui-core": patch
+---
+
+fix(react-ui-core): clamp swipe-back dx to prevent left-drag screen movement
diff --git a/extensions/react-ui-core/src/useStyleEffectSwipeBack.ts b/extensions/react-ui-core/src/useStyleEffectSwipeBack.ts
index 9870aa1a7..610c91829 100644
--- a/extensions/react-ui-core/src/useStyleEffectSwipeBack.ts
+++ b/extensions/react-ui-core/src/useStyleEffectSwipeBack.ts
@@ -251,7 +251,7 @@ export function useStyleEffectSwipeBack({
 
         x = e.touches[0].clientX;
 
-        const dx = x - x0;
+        const dx = Math.max(0, x - x0);
         const ratio = dx / $paper.clientWidth;
 
         moveActivity({ dx, ratio });