use ybase + y when clearing markers

src/common/InputHandler.ts

@@ -1231,8 +1231,8 @@ export class InputHandler extends Disposable implements IInputHandler {
   private _resetBufferLine(y: number): void {
     const line = this._activeBuffer.lines.get(this._activeBuffer.ybase + y)!;
     line.fill(this._activeBuffer.getNullCell(this._eraseAttrData()));
+    this._bufferService.buffer.clearMarkers(this._activeBuffer.ybase + y);
     line.isWrapped = false;
-    this._bufferService.buffer.clearMarkers(y);
   }
 
   /**

src/common/buffer/Buffer.ts

@@ -591,7 +591,7 @@ export class Buffer implements IBuffer {
       for (let i = 0; i < this.markers.length; i++) {
         if (this.markers[i].line === y) {
           this.markers[i].dispose();
-          this.markers.splice(i--, 1);
+          this.markers.splice(i, 1);
         }
       }
     } else {