I'm cross-posting this here, which may or may not be against the rules, but the other post had plenty of views and no responses. I also reported this on github: https://github.com/linuxmint/Cinnamon/issues/1815
and got no responses there either. This issue is very easily reproducible, and granted, is an aesthetic issue, but an issue nonetheless. Any ideas? If someone could just point me in the right direction, I'll try to fix it myself.