Impress pptx -- how to keep PowerPoint from chagning slides when projected

I am preparing presentations using Impress (Version: 24.2.5.2 (X86_64) / LibreOffice Community
Build ID: bffef4ea93e59bebbeaf7f431bb02b1a39ee8a59, OS is Ubuntu UNity 24.04) that will be shown using the conference projection systems running PowerPoint under Win 10 or 11. I have been saving presentations as pptx. When I open them with current PowerPoint running under Win 11 insider build, all my paragraph idents and spacing get messed up. How do I keep this from happening?

John

like what ?
sample + screenshot ?

probably not the safest approach …
Bug List :wink: