Shadow Flickering and Reflection Pattern

Hey guys, I have a weird issue in my render. The shadows on the bottom of the objects are flickering when the camera moves, I tried increasing the temporal and spatial samples, but that didn’t make any difference. I also increased the bound of the objects, which also didn’t change. The second thing, is the weird pattern in the reflection at the end. Any advice would be appreciated.

https://www.dropbox.com/scl/fi/qcr8jcupvavajjhbxrdxh/renders.mp4?rlkey=35ikhhuodkaq654zcrrqfad29&st=fg0vprbq&dl=0