I am also having this issue and have been having this issue ever since upgrading from Toast 16 to Toast 18 (way back in September of 2019). I have talked with Roxio support numerous times without resolution. I have now resorted to purchasing Toast 18 Pro today (Sep 4, 2020) just in case it might fix it, but nope! Roxio, this has been a known issue for far too long across far too many users. Stop blaming Apple and FIX IT!