Unbelievable but true: a Skype extension messes up the copy-paste function in MS Word!!! If you are an MSWord user, never install Skype Click to Call.
While I was writing my book, for a mysterious reason all in a sudden doing a copy-paste eliminated all the footnotes!! You can imagine my agony
I lost a lot of time going back to older versions to find them back and then I looked for almost for a day for a solution on the internet. I repaired MSoffice, I changed the copy paste settings and format setting and nothing helped.
When I almost gave up I found the solution at https://support.mozilla.org/nl/questions/923861#answer-324711
It is a flabbergasting bug: the Skype Click to Call extension in firefox ruins copy paste in MSWord. I disabled it and... MSWord works fine again!!!
And... nowhere on the site of Skype is there a place to report a bug!