The problem

When displaying the difference of a .webp file with transparency, all of the methods except "2-up" shows the older version behind the new one.

Check the screenshots for a more clear example

Release version

Version 3.2.3 (x64)

Operating system

Windows 11

Steps to reproduce the behavior

1. Create a .webp file with transparent background
2. Change the file (pixels with alpha != 0)
3. View the differences from the GitHub Desktop app.

Screenshots

• 2-up
  
• Swipe
  

Additional context

You can check the commit I had the issue with: espale-studios/website@43f2fa0