[Forminator Pro] Forminator causes high server load

Hi there, I have a admin-ajax.php problem caused by Forminator

When i enable the forminator plugin the admin-ajax.php is called 9 times per click

Server log:

87.215.100.170 - - [07/Aug/2019:13:26:24 +0200] "POST /wp-admin/admin-ajax.php HTTP/1.0" 200 4506 "https://www.upsite.online/ons-werk/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36"
87.215.100.170 - - [07/Aug/2019:13:26:24 +0200] "POST /wp-admin/admin-ajax.php HTTP/1.0" 200 4506 "https://www.upsite.online/ons-werk/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36"
87.215.100.170 - - [07/Aug/2019:13:26:24 +0200] "POST /wp-admin/admin-ajax.php HTTP/1.0" 200 4506 "https://www.upsite.online/ons-werk/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36"
87.215.100.170 - - [07/Aug/2019:13:26:24 +0200] "POST /wp-admin/admin-ajax.php HTTP/1.0" 200 4506 "https://www.upsite.online/ons-werk/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36"
87.215.100.170 - - [07/Aug/2019:13:26:24 +0200] "POST /wp-admin/admin-ajax.php HTTP/1.0" 200 3913 "https://www.upsite.online/ons-werk/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36"
87.215.100.170 - - [07/Aug/2019:13:26:24 +0200] "POST /wp-admin/admin-ajax.php HTTP/1.0" 200 4506 "https://www.upsite.online/ons-werk/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36"
87.215.100.170 - - [07/Aug/2019:13:26:24 +0200] "POST /wp-admin/admin-ajax.php HTTP/1.0" 200 4506 "https://www.upsite.online/ons-werk/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36"
87.215.100.170 - - [07/Aug/2019:13:26:24 +0200] "POST /wp-admin/admin-ajax.php HTTP/1.0" 200 3913 "https://www.upsite.online/ons-werk/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36"
87.215.100.170 - - [07/Aug/2019:13:26:24 +0200] "POST /wp-admin/admin-ajax.php HTTP/1.0" 200 4506 "https://www.upsite.online/ons-werk/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36"
87.215.100.170 - - [07/Aug/2019:13:26:26 +0200] "GET /wp-content/plugins/forminator/assets/js/library/intlTelInput.min.js?ver=4.0.3 HTTP/1.0" 200 9713 "https://www.upsite.online/ons-werk/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36"

When I disable Forminator the admin-ajax.php is called 1 time per click

Server log:

87.215.100.170 - - [07/Aug/2019:13:21:27 +0200] "GET /ons-werk/ HTTP/1.0" 200 18385 "https://www.upsite.online/ons-werk/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36"

This causes my website to crash, and use extreme high server resources. After long research i have found out that forminator (premium plugin) is causing the overload problems on my server. We are using forminator on +100 websites.

Can you help me fix this problem?

Best regards,

Roy Janssen