If Sonar cuts or fades in and out during playback, will it freeze one card at a time?

[xguitar]

After the upgrade in July, it was like this, and after the upgrade in August, it was still like this.

[David Baay]

Sounds like maybe a plugin on the Master bus has gone into demo mode due to the trial period or license expiring. Not sure what you mean by "freeze one card at a time".