Form Browser go to not functioning as expected live

Register Form Created and working well -Server Connect : Success / reset and Browser go to in form

Live Test in Browser Issues
however after filling out form - it does “reset” and the address at top of page says “payment.php” buts its still displays previous “register.php” web page
If the browser is refreshed - THEN the correct “payment.php” displays - ( yes I tried different browsers)

Form Page https://www.odessaantiqueshow.ca/register.php
Browser go to page: https://www.odessaantiqueshow.ca/payment.php
cannot figure out what is gg wrong

Community Page
Last updated: