Repro Ratio: 4/4
Regression testing done in //UE5/Release-5.0-EarlyAccess CL-16682836 as this is a new feature to UE5. This issue Also happened in Early Access 2.
Expected Result: WrapBox->ForceNewLine() keep the slot on a new line.
Actual Result: WrapBox->ForceNewLine() does not keep the slot on a new line and puts it back on the first line.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-149447 in the post.