I'm getting some weird crashes when running a simple Resnet model on a GTX 3080Ti in OPENCL backend.
The crash is a division by zero in:

group_ is computed here

In my case inputs[0].size[1] equal 1 and umat_blobs[0].size[1] equals 64

It is going to be a little difficult to provide a simple program reproducing this but maybe someone can already spot an obvious bug.
It seems that it will only crash once, the next run will use the cached kernels and work fine (group_=1)