As per title and this is not all the time or on all tracks. Example audio kick drum track Ozone 8 and one other FX, track plays back perfectly. As I have a low CPU and Ozone is a CPU hog I freeze the insert effects, on play back the kick drum is now completely out of sync and plays almost a couple of bars later. Unfreeze and it plays back perfectly. Anyone else had this intermittent problem. I have rendered the track but just the same problem on the render.
Any suggestions appreciated apart from get a new PC with more CPU LOL.
This was most certainly a PC error caused by a combination of Windows 10 upgrade and a power cut. Shortly after the above the playback started stuttering and CPU spiking. From now on I will use Cubase off line .