I do not have any steps to reproduce this.
It kind of happens randomly, I think this is the second or third time this has happened.
I was using Toneboosters EQ & BARRICADE Effects on the main output
I had a project that was all frozen (8 tracks) I added a midi trfack, opened Rozeta XOX (Bram bos) as a midi effect,
Opened Digistix (4 pockets) as the instrument, started to record 4 bars and noticed the timeline was extremely lagging.
I tried to figure out what the issue was, eventually I opened the mixer section, turned off BARRICADE (Toneboosters) and the lag had gone.
I tried the same effect BARRICADE on a different project without any issues…
After going back to the original project I opened the mixer section and noticed the BRICKWALL had changed to the Equalizer that I was using, where it says “tap to add effect” whatever audio unit I selected came up where BRICKWALL was meant to be…
I do not think it was the BARRICADE effect but more that Rozeta & Digistix both use midi sync and running them both at the same time may have corrupted something.
The project was running perfectly fine with barricade before I added Rozeta & Digistix together.
To get it back to normal (BRICKWALL in correct place) I just closed and reopened Cubasis.
I hope this helps a little,
If it happens again I will send you a Dropbox link with the project