I have been reading this thread with interest. I updated to Cubase 12 last Thursday, the whole process went fine, no problems. Thursday and Friday I played through 8 projects (songs) I am working on that were created with Cubase 11, they all played fine and I noticed that the performance meters seemed lower than in 11 and not one of the songs peaked the performance meters.
Saturday I recorded some new vocals for one song, everything went fine no issues. Sunday & Monday I worked on the same project editing the vocals, all good. Last thing Monday I played through the project a few times, all good, not once had the performance meters peaked, no audio drop outs. So the project is saved and the computer switched off.
Tuesday the computer is on all day (as it is most days, switch on in the morning, off last thing at night) early evening I open Cubase for the first time since the previous evening, I load the project I worked on the previous day, I play the project and the ASIO meter peaks and overloads, the audio drops out after about 5 seconds and continues to do it on and off through the track.
The project is exactly as it was the previous evening when it was played through numerous times with no issues. Nothing new has been done to the project. Nothing new has been installed on the system.
I try numerous things, changing the buffer size, ASIO guard but the project continues to peak the performance meter every time. I return the settings to the normal settings I have been working with.
I close the project and Cubase and go off to eat!
I come back about an hour later, I open Cubase I load the project and it plays perfectly no issues! I play it three or four more times and it plays perfectly, no performance meter peaks.
Today it has played perfectly with no issues.
I am at a loss to understand why for about an hour it refused to play without the performance meter peaking, then after closing the project and Cubase, waiting an hour and loading it again it then plays perfectly.
Cubase 12.0.0 macOS 12.2.1 Mac mini i7 3.2 16GB ram.