During September 2025, this developer focused on enhancing the reliability of oneapi-src/oneDNN by addressing a critical bug in the AArch64 CPU kernel. Using C++ and leveraging expertise in ARM architecture and CPU kernel development, they corrected a logical error in post-operation dtype comparison between bf16 and f16. This targeted fix prevents misidentification of unsupported mixed-precision combinations, reducing runtime errors and ensuring accurate post-operation results for deep neural network workloads on 64-bit ARM systems. Although no new features were introduced, the work improved kernel stability and supported more dependable deployment of bf16 and f16 models on ARM platforms.