generic group non-bonded kernel incorrect PME-switch and RF
The electrostatic energies and forces in the generic non-bonded group kernel are off by orders of magnitude for both PME-switch and RF with potential-shift. Some combinations of PME-switch with LJ automatically use the generic kernels.
Related, I don't see why some combinations, e.g. PME-switch with LJ potential-shift, would not use the SIMD (or C) kernels.