I understand how you feel, thinking that Windows store would provide the kind of software that is best for Windows. I've had that same mindset, in the past. But in this case, it really is probably better to get it from the Inkscape website.
I can't really explain why the version in the Windows store isn't exactly the same as what you can get on the Inkscape website, since the Inkscape project provides Inkscape for the Windows store to use. But somehow, problems have happened, and the problem you're seeing is somewhat similar to the problems we've seen before (as far as I understand).
So the first step in trying to solve your problem, would be to uninstall your current version, and download it from the Inkscape website, and install that. If that version has the same problem, then we can look deeper, and figure it out.