data erased when error made

[GEM]

When a client makes an error on my form, based on validation rules, a Return
to Form link appears in the error message. If the client clicks on that, all
data is erased and a fresh, blank form is presented. If the client clicks on
the browser Back button, all the data is preserved, ready for correction.

How do I prevent the FP bot's bad behavior? Converting the Return to Form to
a Back command would be OK. Returning to the form with errors highlighted
would be ideal.

Thanks for any help.