Magento 2 Forgot Password page incorrect captcha

First, check if you enabled default captcha or not. If it is enabled then Disable that, then it will work.

Here is the whole script. I have added jQuery bind concept to reload captcha when forgot password page is loaded.

Here is the path to add the below script.

/app/design/frontend/NAMESPACE/YOURTHEME/Magento_Customer/templates/form/forgotpassword.phtml

<script>
require(["jquery"], function ($) {
    // Reload captcha when page loaded
    $(window).bind("load", function() {
        // Use setTimeout to trigger captcha reload. 
        $(".action.captcha-reload").trigger("click");
    });
});

I've adding custom script that can be reloading the captcha image.

In:

/app/design/frontend/name_space/theme_name/Magento_Customer/templates/form/forgotpassword.phtml

Custom script:

jQuery( "captcha-button-selector" ).trigger( "click" );

Then it's solved my problem.

@Kumar thanks.

After every action Magento does refresh captcha session so if any Ajax URL run and you open your forgot password then at that time captcha session will be changed that's why you are getting error. Just click on reload captcha button and then refill again to proceed successfully.

You can add scripts to reload captcha when that from open so you will not get error again.

You can manually trigger reload by this

$('.action.captcha-reload'). trigger ('click');