Just a heads up, that NumPy is seeing some problems with OpenBLAS 0.3.12.

We released NumPy 1.19.3 with OpenBLAS 0.3.12 in order to fix the windows fmod problems. We had to back it out and are releasing a 0.19.4 with the previous OpenBLAS and code to error out if the fmod bug is detected instead. We got reports that 1.19.3 crashes, xref numpy/numpy#17674 and numpy/numpy#17684. In the first issue, the reporter provided a docker image and code to repoduce output of some system diagonstics. The second issue is a lack of memory in hstack, which is difficult to attribute to OpenBLAS, so there may be something else going on.
Both issues were "fixed" (or covered up) by the 1.19.4 release candidate with an older OpenBLAS.
Does any of this make sense to you?

Edit: no docker image, just diagnostics