How to stop from refreshing the page on track_forms?

[maqboolmudasir8]

Hi there,
I am using mixpanel-browser in next.js, and I'm tracking a form during initialisation.
I'm facing an issue that whenever the form is submit, the page refreshes automatically, I used preventDefault() but still page refreshes.

Can you please guide me how can I stop the page to refresh?

My code:

init file code:

mixpanel.init("TOKEN");
mixpanel.track_forms("#signUp", "Account creation submitted");

signUp file code:

<form id="signUp"
        onSubmit={(e) => { 
            e?.preventDefault(); 
            onSubmit(e) 
        }}
      >
....
      </form>