So what's the fix if you have "Simulate a new user for each iteration" checked.
Using LR12.02 with QCIM1J79483 patch, TruClient for FireFox
(QCIM1J79483 Patch to resolve LR 12.02 Crashing due to Microsoft Security Update KB3038314)
My script runs fine in Interactive Mode, but only runs 2 iterations before getting hung at Navigate step.