double click and drag highlight words in Impress

Hi all,
I am new to LibreOffice. I recently started making presentations using LibreOffice Impress and one thing has been annoying me:
When I double click a word and highlight it and then drag the mouse in order to highlight the next words it doesn’t do anything.

On the rest of my OS it works fine, as well as in LibreOffice Writer.

If it is relevant I am running Ubuntu Mate 16.04.

Thanks in advance for any help available!

This happens in both LibreOffice 5 and 6