diff --git a/packages/ketcher-core/src/application/editor/modes/SequenceMode.ts b/packages/ketcher-core/src/application/editor/modes/SequenceMode.ts
index a3ac92f04f..9fc58077c6 100644
--- a/packages/ketcher-core/src/application/editor/modes/SequenceMode.ts
+++ b/packages/ketcher-core/src/application/editor/modes/SequenceMode.ts
@@ -835,6 +835,20 @@ export class SequenceMode extends BaseMode {
     const chainsCollection = ChainsCollection.fromMonomers([
       ...drawingEntitiesManager.monomers.values(),
     ]);
+
+    const currentSequence = SequenceRenderer.currentChain;
+
+    const currentSequenceHasPhosphate =
+      currentSequence?.lastNonEmptyNode?.monomer?.monomerItem?.props?.Name ===
+      'Phosphate';
+
+    let nextCaretPosition =
+      SequenceRenderer.caretPosition + chainsCollection.length;
+
+    if (currentSequenceHasPhosphate) {
+      nextCaretPosition -= 1;
+    }
+
     const modelChanges = this.insertNewSequenceFragment(chainsCollection);
 
     modelChanges.addOperation(new ReinitializeModeOperation());
@@ -842,7 +856,7 @@ export class SequenceMode extends BaseMode {
     modelChanges.addOperation(
       new RestoreSequenceCaretPositionOperation(
         SequenceRenderer.caretPosition,
-        SequenceRenderer.caretPosition + chainsCollection.length,
+        nextCaretPosition,
       ),
     );