Text in field PDF is restricted in width

Can you have a look to this (strange) thing?

In a PDF I have inserted a field (long field). Text is in red.

But it seems the text will not "fill" the whole space but is aborted on one or other way.

There must be a reason for this, but I can't find it or overlooked it...

How can I adapt this?

You may change the alignment as shown below from the PDF Editor:

Would this help?

Of course. I forgot that.
Thanks Gerard !