I ran your input with current develop. It seems that once the extra electron is added, the inital VMC already goes wrong. I tried without Jastrow with AoS and SoA code. The AoS code already gives 10^14 variance while the SoA code shows very absurd energy trajectory, having some jump like a step function, although the energy values are around -130. v3.1.1, v3.4.0 and v3.5.0 AoS builds both show insane huge variance. I think something is wrong with the orbital or cusp correction.