I am having the same issue.
Here are the plugins I am using:
Authorize.net AIM Payment Gateway For WooCommerce
Authorize.Net WooCommerce Lightweight Addon
Cart66 Cloud (this one is deactivated)
Coming Soon Page & Maintenance Mode by SeedProd (this one is deactiviated)
Complete Central Backup
Constant Contact Forms by MailMunch
Contact Form 7
Custom Login (this one is deactivated)
Dean’s FCKEditor For WordPress
Go Daddy Quick Setup
Options Framework
Profile Builder
Really Simple CAPTCHA
Revolution Slider
Sidekick (this one is deactivated)
Simple Backup
Ultimate Coming Soon Page
UpdraftPlus – Backup/Restore
USPS WooCommerce Shipping
WooCommerce
WooCommerce – Store Exporter
WooCommerce POS
WooMobile
WordPress Importer
WP Ultimate CSV Importer
WP101 Video Tutorials
WPBakery Visual Composer
YITH WooCommerce Compare
YITH WooCommerce Wishlist
YITH WooCommerce Zoom Magnifier
I hope this helps, to figure out the issue.
Thanks!