Very low Geekbench metal score..

So I bought this used iPhone 11 Pro and I took some tests using Geekbench and the single core score and multi core score were really good, above average and when I tried to run a compute score it gave me a super low score in the 2000 range. And it says “One or more workloads have failed validation and have been assigned a score of zero.” I did it multiple times and the tests that usually fail are stereo matching and feature matching. I tried it again this morning and feature matching worked and got a slightly higher score but still super low. I even tried Amtutu and everything was fine. What could be the issue? I’m on iOS 14.4.1