It's been happening since the update, across several projects. One a comp of ACES CG passes HD composition and today a large comp of just static images 2k with drop shadow creating a photo montage on a 7k composition. They are all in 3D space and there are 60 or so images. I wouldn't say either was massively complex. Both used Redgiant plugins only.
Multi monitor set up, 2x4k monitors. Plugged into one of the 3090 GPUs.
Not sure how it can be running out of GPU memory. 48gb!