Bug Report: runpf() doesnt converge when running on results obtained using runpf()

[yangyang]

Dear All,
https://github.com/Vurgit/case_IEEE123/blob/master/grid_IEEE123_complete.m
This case can converge, but if runpf() again on the results of the case, it 
doesnt converge! I have never seen this before and I think it might be a bug