Different behavior between editor and standalone changing time step

Hello, i need to run a simulation with a fixed update very small, like 0.01. The simulation works fine in the editor ( is a bit slow but i don't mind). The problem is that if I deploy it as an app and run the app, the simulation doesn't start at all. After some trial I found that this issue depends on time-step: If I change the fixedTime step to a value of for instance 0.02 then everything works fine even in standalone application. What can change behavior in such way from standalone to editor? Thanks a lot for help.