In some scenarios I cannot preserve my formatting when copying-and-pasting, though the behavior is not consistent (i.e. sometimes it works and sometimes it doesn't). I am aware of the special pasting function to select the option to preserve formatting--it does not work.
This is true no matter where I'm pasting my content (i.e. word document, OneNote, excel). Also it does not matter whence the copied content originates (i.e. web browser, office document, etc).
I have tried reinstalling office to no avail (I use Office 365 for what it's worth). This is on a Windows 10 machine using Dell XPS 15. I have another PC at home that does not replicate this behavior. I fear it could be some software I've installed that is causing this, but this behavior began probably a year ago now and it isn't practical for me to do a system reset back to that time.
I have seen similar questions here:
Edit: I figured out that the problem was an app that allowed me to share the clipboard between my computer and phone (either PhoneLink or KDE Connect, I disabled the feature on both).