Just installed 3.0 to give it a try and I noticed that during Cycles render I only see a single bucket. I changed the tile size to something lower than the default 2048. I tried the render with the default auto thread detection and I tried manually setting it to 4. Still I only see a single bucket. Is this normal on v3.0?
I’m on a Mac (intel) with an integrated GPU so only use CPU rendering. In Blender 2.93.x I do see 4 buckets during rendering.