Why I am not getting a proper B-H curve?

I have plotted a B-H curve based on simulink model. But when it reaches to satuation, to does not comes backwords properly. The curve tends to grow more on value while H is decreasing and after some time period it starts working propoerly. I have attached an image of this phenomenon. Can anybody suggest it why it is happening?

[Riccardo Scorretti]

Your question is too vague. Which model of hysteresis are you using? Can you share your code? Are you modeling static or dynamic hysteresis?