I’m downloading MS PP slides from AARP Tax-Aides, but Impress omits the titles on the slides and some text is the wrong font size. Last year I did the same thing and had no problems.
http://assets.aarp.org/www.aarp.org_/articles/taxaide/extranet/sitequality1013.ppt on LO5.2.2.2 and PowerPoint 2016 perfect match. However, Office 2016 being installed might be making it possible.
I opened that file in LibreOffice Impress v5.2.4.2 and it looks fine.
Titles are all there.
Text all appears to be appropriately sized.
Please provide a link to one of the files.
Or, attach the file here.
That way we can take a look at what is happening.