Middle selection adds extra word

Hey,

This has started on my phone a couple of months ago. (I am not swiping generally). When I type and then select the middle prediction, it adds one extra word that I didn't see select. It just did it actually. I selected the middle prediction which was "select" and it inserted "see select". I want to select the prediction "about" and it inserts "a bout about". It doesn't make any sense as you can see. How do I turn this off?

Thanks in advance
Ksenia