In the past 24 hours, any recipe including those >10 levels below which should take 3-5 steps max are coming back in the Monte Carlo Sim as 0% progress "NaN" and with 100% High-Quality.
Haven't played with settings to my knowledge. For example "Lignum Vitae Lumber" with the following stats:
Class: Carpenter
Level: 82
Craftsmanship: 2606
Control: 2457
CP: 507
Recipe Name: Lignum Vitae Lumber
Recipe Level: 78
Solver Seed: 1662020944217
Steps To Reproduce
No buffs, no food. It displays zero progress in the output.