I believe I’ve found a bug specifically in the way Neovim is packaged on Tumbleweed for the x86_64 arch. Where would I report this?
In general it is a good idea to discuss the problem here first. This e.g. to upgrade your “believe” to more certainty. 
You can file bug reports at https://bugzilla.opensuse.org/index.cgi, using the same username/password as here on the forums.
More information: https://en.opensuse.org/openSUSE:Submitting_bug_reports.