Hello! My name is Mostafa, and I will try my best to assist you with this so that you find a satisfactory solution.
I’m sorry that you are experiencing this issue. The memory requirement for Davinci is 32 GB. You can limit it by going to Preferences > Memory and GPU > System.
If you still have issues, it's a software issue; it might be worth contacting Davinci support or increasing your Ram capacity. Thank you.
Best,
Mostafa