simulation of the behaviour of a PCB Spark Gap

I mean, when I change the value of the gap, the behaviour of the currents is not working as it should. For example, when I change the d in some values it appears like there is no current, but if i use the same d+0.01 maybe yes. Furthermore, between some values ( for example 1<d<5 lets say), the only thing that changes is that the peak current is delayed, but the max value is still the same... I don't know, maybe I'm doing something wrong but I have been testing it a lot of hours with to get the expected results but I wasnt able lol

I know that the results wont be the same like in real situations, but there are some behaviours that should work properly