Magento 1.9.4.2 known issues: compatibility with third-party checkout extensions

Question

Did anyone encounter a problem with a third party checkout extension like Amasty OPC or IWD OPC? I haven't upgraded yet to Magento 1.9.4.2 because I read in the release notes that:

"Third-party checkout extensions and closed security cases will either not work securely or will not work at all."

https://devdocs.magento.com/guides/m1x/ce19-ee114/ce1.9_release-notes.html#ce19-1942

Answer 1

We use OneStepCheckout.com and the problem I have is after adding products to the shopping cart, they appear in the dropdown display of the shopping cart but the system says the Shopping Cart is empty when I click to display the shopping cart. I see that there is a newer version of One Step Checkout and I will upgrade and test again and report here but that may be a few days because I must get approval for the expenditure. I am working with a Development site so the delay is not a problem.