I have never had this problem before. But, suddenly out of the blue, when I try to write in LibreOffice and copy/paste it into Wordpress - wordpress… freezes? My mouse won’t show up, and then it just hangs, asks me if I want to kill the page etc. I tried it 4 times. Every single time it freezes. What the hell? Why is it doing this all the sudden?
Is it becauase you are using line feeds instead of ne paragraph marks and you are exceeding the number of characters in a paragraph limit in Wordpress?
I have been using WordPress for the last 4 years. it happened to me when I was writing a blog on inspirational books at that time I resolved that issue by changing the browser. I switched to firefox and it worked for me.