Arm64 builds failing blas tests - did the hardware change recently?

Five days ago the numpy builds on arm64 started failing. This is also common to the scikit-learn builds and others. What changed? Here is the NumPy issue numpy.linalg.LinAlgError: Eigenvalues did not converge on ARM64 builds · Issue #19411 · numpy/numpy · GitHub


You can try to run the lscpu command, and see the result.

As a reference, here is the result of lscpu a month ago. You can compare your result with this.