I would suggest you to use anyother device and use the browser like Chrome or Mozilla Firefox and fill the form. This kind of problems can be due to the server lagging or due to your device from which you are filing up this form. So try to fill the form, from any other device and if still the problem persist then contact the helpdesk of KCET which you will get from the official website of the examination.

To know more about KCET as a career, visit the link below:

https://www.careers360.com/exams/kcet

I hope this answer helps. All the very best for your future endeavors!