I also have that issue, and I remember that on my side I was changing some default settings during the optimization, so it might be related.
UPD: Yes, for me it was Forward Render->Forward Shading checkbox activated.
I also have that issue, and I remember that on my side I was changing some default settings during the optimization, so it might be related.
UPD: Yes, for me it was Forward Render->Forward Shading checkbox activated.