Peter Steinberger on Twitter, just posted a quick tip that reverts the current behavior of silent failures under recent versions of macOS.
Use NSUserDefaults to set the value of “NSApplicationCrashOnExceptions” to true and your application will crash like it used to. Thus generating a crash report, showing you what went wrong and where. Opposed to silent failures, which are hard to find in console.
He also posted this one back in October 2019, but I didn’t see it.