UI Colors resets after compiling

General Issues and Bug Reporting (Unreal Engine)
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Summary

When I tried to change the background color on a button, it got resat when I compiled the Widget.
It also happened earlier in my work with a Border.

What Type of Bug are you experiencing?

UI / Tools

Steps to Reproduce

  1. Create a Widget Blueprint
  2. Add a Canvas Panel
  3. Add a Size Box
  4. Add a Button to the Size Box
  5. Add an Image to the Button
  6. Select the Button and change its background color with the color picker
  7. Save & Compile

Expected Result

The background color of the button will reset.

Observed Result

The background color of the button was resat.

Affects Versions

5.8

Platform(s)

Windows