Courier Delivery Plugin – Delivery Options Disappear at Checkout

Good afternoon, I started setting up courier delivery services using a plugin, but they are not displayed on the order page. When I refresh the page, the added block appears for two seconds and then disappears for some reason. Please help me figure out the problem. Thank you.

Checkout page https://slhome.com.ua/checkout/

I added a photo of the block that is needed at checkout, but it disappears.

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Hello,

To better assist you, could you kindly test the functionality with default WordPress themes such as TwentyTwenty or WooCommerce Storefront? This will help us determine whether the issue stems from our theme or elsewhere.

Regards

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