Text Wrapping not working

Hello,
In Unreal 4.18,I recently started work on localization for my project. There are lots of multi line message shown in TextBlock or TextBlock(Multi-Line). After I checked ‘Auto Wrap Text’ and set ‘Wrapping Policy’ to ‘Default Wrapping’, the word was cut,and shown to next line.

I expect the word ‘network’ can jump to the next line.I don’t know how to make the whole word wrap when the amount of space left wouldn’t be enough for the next word?

The size of these TextBlock are not constant, they are changed based on their parent container’s size.I usually use ‘Alingnment’ to set the size.
So I can’t set the value of ‘Wrap Text At’.

Thanks for the answer! You are right, my colleague change the engine,but I didn’t know it.

Hmm, the text in the property panel is being wrapped incorrectly too.

I couldn’t reproduce this myself, have you made any changes to 4.18? Also, could you paste that text here just to rule out there being any special characters in it (like breaking zero-width spaces) that are causing extra break candidates?