Perturbation glitch

I've tried to reproduce the image posted here but failed, even at the "Precise" setting for Perturbation: essentially, the whole center is 'missing'. While such problems can always occur, I thought I'd report this in case you want to make the algorithm a bit more robust.

• Re = -0.1539465335054964690901834505221291075155694452817396340987201
• Im = -1.0305167650006597878219407890356644240263797942098130256464863
• Mag = 2e56

Thanks, I'll investigate what's happening. It's my goal to automatically get correct images without glitches so I'm interested to see what is causing the perturbation algorithm in UF to fail here.