Cubase not playing sound from some instruments

I just opened a project and found that some VST instruments were not playing any sound until I muted and then unmuted them.

Am I missing something here or has anyone else experienced this?

It’s obviously very worrying as now I’m wondering if I have to check every single instrument each time I open a project to make sure all sounds are playing

Running Cubase Pro 13.0.41 on an M1 Macbook Pro in Rosetta mode. I haven’t noticed this happen before on my Windows PC

Hi,

Try to click the Deactivate All Mute States, please.