Description
When I use the smuggle tool to drag the paint of pencil, some grapical errors appears.

Expected result
No graphics error.

Actual result
Some points remain on the path I dragged them.

Steps to reproduce
1. Click on the Smudge Tool
2. Click one of my pencil draw in vector mode.
3. Drag the selected draws away.
Video or Image Reference

System Information
- Pencil2D version: <0.7.0.939>
- Drawing tablet: <None>
- Operating System: Windows 10 Version 2009
- CPU Architecture: x86_64
- Qt Version: 5.15.2
- GPU: Intel UHD Graphics 630