Check document doesn't work

Hi,

I’d like to do a final round of proofreading with LT for a book (after having proofread it myself, of course), but when I cllick “check document” it only lists about three issues and then I have to click on “check document” again, so absolutely nonsense. Can anybody help with this?

How do you use LT? In MS Word? In that case, have you tried uploading the *.docx file on languagetool.org?