Mint says there are "Known Issues" well why don't they fix them ? Instead of telling people to try workarounds.
I'm not a Mint developer, but I am on the Lubuntu team. We see this a lot. Known bugs get through to the final release for a variety of reasons. It's normal.
There's a few complicated reasons for that. Often, they're not in charge of the software itself. While they can theoretically fix it, it still has to go through approval, get included, get uploaded to a testing repo, get used and tested, and finally make it back down.
Sometimes, there's a feature freeze and software freeze. This means they set themselves a singular target and don't increase the version number - for stability sake or just to mark a line in the sand so that they're not constantly changing it.
Other times, especially when you're using a derivative of a derivative (like Mint does), you have to keep the software the same as is in the default repos, rather than adding more software to your to-do list. So, you're beholden to the authors to fix it and push the patch through.
This is why there are those 'release notes' that we never read.