The FOM behaves differently, it increases and converges to 0.5 (unlike the example with one FOM). I have tried increasing the number of iterations to a high number but the optimization always ends with the message
Also, if I can ask another question, I am unable to run an optimization for an area larger than 5x5 um. I have tried many different mesh sizes but for any area larger than 5x5 it is unable to calculate the gradient. Do you have any suggestions for this?