Form submission taking too long to submit in contact form wordpress

Where can we see the website in question?

Hi 

I have attached here the page link, in that link you can see the banner form and footer form and if i submit the form it takes too long.

I have check to disable plugins that is related to the contact form i am using my BE theme in our websites

https://www.riverstonetech.com/cloud-based-erp-system-implementation/

Please check the above link

What other plugins and theme do you use on the site?

I am using be theme in our websites

The plugin list are

1. Akismet Anti-Spam
2. All-in-One WP Migration
3. BeTheme Header Builder
4. Contact Form 7
5. Contact Form 7 Shortcode Enabler
6. Elfsight Testimonials Slider CC
7. Extensions For CF7
8. Force Regenerate Thumbnails
9. GTM4WP – A Google Tag Manager (GTM) plugin for WordPress
10. Imagify
11. LayerSlider WP
12. Logo Slider and Showcase
13. One User Avatar
14. Popup Anything – A Marketing Popup
15. Real Testimonials
16. ReCaptcha v2 for Contact Form 7
17. Site Kit by Google
18. Slider Revolution
19. WordPress Importer
20. WP Client Logo Carousel
21. WP File Manager
22. WP Mail SMTP
23. WPBakery Page Builder
24. WPCode Lite
25. Yoast Duplicate Post
26. Zoho SalesIQ

please have look here

Try switching to the default theme, deactivating all plugins excluding Contact Form 7, Akismet Anti-Spam, Site Kit by Google, WordPress Importer and WP Mail SMTP, and clearing all cache data.

Why you are advised to deactivate plugins and switch to the default theme.

we can’t unable to disable the theme and plugin because the site is live now, is there possible to find solution in another way ?

Hi we found that issue from contact form 7 mail tab , If i enable the 2 mails on the mail tab it will be delayed for submit the form

This below image is Mail first

Second one mail 2

If i disable the second mail the form submit takes 5 sec only , we are using it form customers thank you message send.

If i any other way to use only for the mail config, Please give me some idea here

Please reply as soon as possible,I am very upset that you are giving such a response