Hi @rangelrmorais,
Can you please double check you are using WooCommerce Wholesale Prices by Rymera Web Co?
We thoroughly test with all latest version of WooCommerce and WordPress and have no reports of similar so I’m thinking if you are using our plugin, then it must be a conflict with another plugin or theme.
Few steps for you to trouble shoot this:
1. Check your PHP error log for errors. This might point you to the problem. If there are any “Notices” that could halt execution and stop other plugins (such as ours from executing).
2. Check you are on PHP 5.6+ on your server. This is required by us and also by WooCommerce. Versions below are not guaranteed to work. You can check this under WooCommerce->System Status in your dashboard.
3. Lastly, if it is a plugin/theme conflict please disable all other plugins other than ours and WooCommerce and also change your theme to one of the default themes (like TwentySeventeen) to see if the issue goes away.
If it does, reactivate your theme and plugins one by one, testing in between, until you find the problem.
Hope this helps.