Help with improving Visual Stability

Hello,

I need some direction and instructions to help minimize my visual stability. I am using the Dawn theme, and the visual stability was fine last night. When I woke up, it had increased. I didn’t do anything to make this happen. I have optimized all my photos, etc. Clearly there is something that I’ve missed, but I find it weird that it happened overnight with no additional changes.

Any help would be greatly appreciated! My website is: https://www.avycoffee.com