I get autofill data when clicking the email field

why do I get a sample_text hint when I click on email address

I am not getting anything when I tried filling your form.

That's most likely an autofill data saved in your browser. In other words, it is only available in your browser not from everyone else.

Here's how to disable it on Chrome https://support.google.com/chrome/answer/142893?co=GENIE.Platform%3DDesktop&hl=en.

And here's a guide if you're using firefox https://support.mozilla.org/en-US/kb/control-whether-firefox-automatically-fills-forms.