The problem is this: there is a jQuery script
$("#captchaField").on("keypress keydown blur",function (event) { "use strict"; $(this).val($(this).val().replace(/[^\d].+/, "")); if ((event.which < 48 || event.which > 57)) { event.preventDefault();} }); It allows you to enter only numbers in the field, but when I try to clear it by pressing backspace or replace it with the current value by selecting a character and try to replace it with another one (I can explain it incomprehensibly, but you can select characters in input and when you press any key with the character input value you selected will be changed to the key symbol). With this script, these features are curtailed. Help get them back.