Materialize stepper back button issue on double click

[jasirec]

I am using Materialize Stepper in my project to display multi forms, everything is working fine and i noticed that when double click on back button all the content become blank and we have to refresh the page.

https://codepen.io/jasirec/pen/qBXQLZo

Please check the above codepen page and when you click next button and from second step if you tried to double click on back button all content will be washout.

If anyone can check and suggest some solution that will be great help.