Right now I am blocked in the App Store approval process because of this bug reappearing in Xamarin.Mac: https://github.com/xamarin/xamarin-macios/issues/4337
As you can see from the bug, there was a version available at the start of the December 2018 that worked properly. As I didn't have any other particular problem with this version to have any motivation to use the newer version, for now I would like to keep with it until the problem (hopefully) resolves.
The problem is that the only thing I could do was to uninstall Visual Studio 2019 and install Visual Studio 2017, but it brought me back just to the version of February 2019 which seems to have the same problem.
Unfortunately I don't see how to get some earlier version than that. I've seen only documentation on how to install earlier Visual Studio for Windows and even there only for Professional and Enterprise, not Community edition.
I would appreciate some suggestions, thanks.