Issue:
I just installed module version 2.2.9 on M2.4.3 and it is not consistent. I have just tested it using default theme Luma to confirm.


Solution:
This issue happens with checkout Guests.
To solve it, we have changed three files as below:
app/code/Bss/OneStepCheckout/view/frontend/requirejs-config.js
app/code/Bss/OneStepCheckout/view/frontend/web/js/action/select-billing-address-mixin.js
app/code/Bss/OneStepCheckout/view/frontend/web/js/view/billing-address.js
Please apply the hot-fix files on the site.
Reach us now!!
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Our core strength is Magento, with 150+ extensions designed to enhance store performance and drive growth. With deep expertise from years of working on Magento websites, we deliver scalable, high-impact solutions backed by strong client trust.
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