diff --git a/CHANGELOG.md b/CHANGELOG.md
index 88b44a4b..d513365a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -35,6 +35,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - Fix template preview by @vadimkerr ([#3937](https://github.com/grafana/oncall/pull/3937))
+- Fix an issue when dragging the rotation form ([#3986](https://github.com/grafana/oncall/pull/3986))
 
 ## v1.3.106 (2024-02-20)
 
diff --git a/grafana-plugin/src/containers/RotationForm/RotationForm.tsx b/grafana-plugin/src/containers/RotationForm/RotationForm.tsx
index d5cd251e..de21b9f8 100644
--- a/grafana-plugin/src/containers/RotationForm/RotationForm.tsx
+++ b/grafana-plugin/src/containers/RotationForm/RotationForm.tsx
@@ -716,10 +716,11 @@ export const RotationForm = observer((props: RotationFormProps) => {
       return;
     }
 
+    const scrollBarReferenceElements = document.querySelectorAll<HTMLElement>('.scrollbar-view');
     // top navbar display has 2 scrollbar-view elements (navbar & content)
-    const baseReferenceEl = document.querySelectorAll<HTMLElement>('.scrollbar-view')[1];
-
-    const baseReferenceElRect = baseReferenceEl.getBoundingClientRect();
+    const baseReferenceElRect = (
+      scrollBarReferenceElements.length === 1 ? scrollBarReferenceElements[0] : scrollBarReferenceElements[1]
+    ).getBoundingClientRect();
 
     const { right, bottom } = baseReferenceElRect;