Crossfade of images distorted when track size filter width is odd number

[arenaaz]

Operating system: Windows 10 Pro 1903
Shotcut version: 20.11.28 64-bit

Steps to reproduce problem:

1. Start a new project
2. Add video track
3. Insert two images into video track
4. Drag one image over the other to create crossfade
5. Add “Size, Position & Rotate” filter to track
6. Change size “width” to an odd number
7. Observe distorted crossfade object

Width is even (top image) vs width is odd (bottom image):

[Namna]

Looks like this.
https://forum.shotcut.org/t/zoom-in-out-with-fade-video-causes-diagonal-jitter/22996

[shotcut]

This problem is fixed for the next version 21.01