UMG autowrap makes text flicker upon appearing

I’ve now inserted hard line breaks now with SHIFT + Enter . These should generate the fixed-width wrapping. Correct?
I have tried the result on PC and a Nexus5 and I think the 1 frame auto-wrapping is gone now. Since the auto-wrapping is no longer called into action.

If I store my text in variables - I always need to calculate at what word it should go onto a new line. There must be a more convenient way to do this I hope?

Any help appreciated.