Json / 503 Error

Currently using the latest Free Version: 4.4.7, it hangs the whole server when page UPDATE is hit, it creates several POST requests and overwhelms the server with 503 errors.. The issue was noticed last month ( old version, current version same issue )

——WebKitFormBoundarycBkEgJ4E3HVwfp9t Content-Disposition: form-data; name=”action” global_styles_update ——WebKitFormBoundarycBkEgJ4E3HVwfp9t Content-Disposition: form-data; name=”admin_nonce” e4e2af97c0 ——WebKitFormBoundarycBkEgJ4E3HVwfp9t Content-Disposition: form-data; name=”eb_global_style_key” global_colors ——WebKitFormBoundarycBkEgJ4E3HVwfp9t Content-Disposition: form-data; name=”eb_global_style_value” [{“color”:”#101828″,”name”:”Primary Color”,”slug”:”primary”,”var”:”–eb-global-primary-color”},{“color”:”#475467″,”name”:”Secondary Color”,”slug”:”secondary”,”var”:”–eb-global-secondary-color”},{“color”:”#98A2B3″,”name”:”Tertiary Color”,”slug”:”tertiary”,”var”:”–eb-global-tertiary-color”},{“color”:”#475467″,”name”:”Text Color”,”slug”:”text”,”var”:”–eb-global-text-color”},{“color”:”#1D2939″,”name”:”Heading Color”,”slug”:”heading”,”var”:”–eb-global-heading-color”},{“color”:”#444CE7″,”name”:”Link Color”,”slug”:”link”,”var”:”–eb-global-link-color”},{“color”:”#F9FAFB”,”name”:”Background Color”,”slug”:”background”,”var”:”–eb-global-background-color”},{“color”:”#FFFFFF”,”name”:”Button Text Color”,”slug”:”buttonText”,”var”:”–eb-global-button-text-color”},{“color”:”#101828″,”name”:”Button Background Color”,”slug”:”buttonBackground”,”var”:”–eb-global-button-background-color”}] ——WebKitFormBoundarycBkEgJ4E3HVwfp9t–

Thanks