Fix teleport issue when coming back from alt buffer

src/common/services/BufferService.ts

@@ -148,4 +148,11 @@ export class BufferService extends Disposable implements IBufferService {
       this._onScroll.fire(buffer.ydisp);
     }
   }
+
+  /**
+   * Synchronize the scroll position by firing a scroll event with the current buffer's ydisp.
+   */
+  public syncScrollPosition(): void {
+    this._onScroll.fire(this.buffer.ydisp);
+  }
 }

src/common/services/Services.ts

@@ -22,6 +22,7 @@ export interface IBufferService {
   onScroll: Event<number>;
   scroll(eraseAttr: IAttributeData, isWrapped?: boolean): void;
   scrollLines(disp: number, suppressScrollEvent?: boolean): void;
+  syncScrollPosition(): void;
   resize(cols: number, rows: number): void;
   reset(): void;
 }