One way is to export/ copy Claude MD and import that to Word using Writage add-on (https://www.writage.com), it’s not free but once you buy it, you can install it on all your Word instances (I have both Mac & Windows Word for example). They offer 14 day trial so you can try it out. It also comes with lightweight application to convert Markdown to Word or vice versa that can be handy for quick work.
I’ve found it very useful because I prefer using Markdown to write documents but at work everything has to be Word of course.
After fussing around for a few hours, I’ve learned Scrivener only appeared to be the issue, but it was Apple Pages creating the issue. Why? I haven’t figured that out, yet. It’s an Apple issue, though.