Same product version, same project, same external hard drive, and clip markers won't show up on Windows but will show up on any Mac. Restarted computer, erased preferences, reached out to Adobe support, imported the project into another project, imported the sequence into a new project. No luck.
Certainly it is enabled, and I can add new markers and they show up, but this is an unnecessary step because the clips have a bunch of clip markers that just aren't showing up on windows10. Unless this is another bug.