Editing the text for a long label is not possible in Version 4. Only the first NNN characters may be seen and edited.
For example, here is my label:
And here is the input field for it:
It is not possible to edit the text after the word “pending” in the above example.
This is a regression from Version 3.
Whilst a possible workaround is to use a Text component instead of a Label, they are not as elegant. I would have to manually size them to accommodate the text vertically and horizontally.