Hi @nataliactivex,
did you check this on the Storefront theme? Simply updating the plugins may not help. I would like to rule out theme conflict to find a solution to your problem.
Another way is to see if the problem also occurs when our plugin is deactivated. You can test add two Flat Rate shipping methods (WooCommerce default shipping), disable our plugin and see if the problem still occurs. This will allow you to determine if it is definitely a problem with our plugin.
I would appreciate your testing. Unfortunately, I can’t replicate the problem and test it myself.
If you have any additional questions, feel free to ask me.
Kind regards,