solid white or light color BG issue

[xyzDist]

System Info / 系統信息

Hi Dev,
I did couple tests, when there is light color or white color in the reference image, the generation BG will have weired color changing, even I have prompts mention white solid BG color still not working, do you see the same thing? could you have a look, thanks!!

20251219_00017-audio.mp4

Who can help? / 谁可以帮助到您？

No response

Information / 问题信息

• The official example scripts / 官方的示例脚本
• My own modified scripts / 我自己修改的脚本和任务

Reproduction / 复现过程

Expected behavior / 期待表现

should have the same as reference image BG.

[xyzDist]

just to report it, if this is preview version limitation that's totally fine.

[xyzDist]

[teal024]

just to report it, if this is preview version limitation that's totally fine.

We greatly welcome your feedback! We have indeed identified this issue. Because there are almost no samples with white or pure light color backgrounds in the training data, background variations may occur when a white background is encountered. This is a very important issue, and we truly appreciate you pointing it out. We will work to improve this in the official release.