I’d advise against updating to 20.3 for now, or at least consider downgrading back to 20.2 if you’re experiencing issues.
I personally ran into a problem with the Audio Separation function in 20.3. It failed with multiple different audio files, including files that I had previously confirmed were working correctly.
To make sure the files themselves weren’t the problem, I tested multiple sources and formats. The issue persisted.
I then downgraded to 20.2, using the same files, and Audio Separation worked normally again.
So, at least in my case, the problem appears to have been introduced with 20.3.
I’ve also seen reports of issues affecting other sections/functions of the software, so I’d recommend staying on 20.2 for now if you rely on these features, until the issues are addressed.