ISSUE:
We've updated Bss One Step Checkout Module from 2.2.9 to 2.3.1 and the Paypal payment method stopped working on one step checkout page, problem is reproduced with PayPal sandbox credentials and in production mode too.
Here is the video before BSS One Step Checkout update https://www.youtube.com/watch?v=NsXbZVNUCTE
Here is the video after update https://www.youtube.com/watch?v=upSa7LVVsA0
SOLUTION:
The PayPal payment method is not working properly in case the customer has logged in
To resolve the issue, please edit the file app/code/Bss/OneStepCheckout/view/frontend/web/js/action/set-payment-information-extended.js:

If you need any further assistance, please feel free to contact us. We'd be happy to support you!
About us
BSS Commerce is a trusted Magento 2 extensions provider with 14+ years of experience, serving 75,000+ customers worldwide. We are an Adobe Commerce Solution Bronze Partner and a Select Magento Extensions Builder, reinforcing our expertise in the Magento ecosystem.
We specialize in developing 150+ high-quality Magento 2 extensions that enhance functionality, improve user experience, and support scalable growth. Our reputation is built on long-term partnerships, positive feedback, and proven performance-driven solutions.
Explore our extensions: https://bsscommerce.com/magento-2-extensions.html
For B2B businesses, our Magento B2B Extension by BSS Commerce is a flagship and widely adopted solution globally, offering advanced pricing, company account management, and streamlined workflows.
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