We've been chasing this bug since early July with a client. We have very clear data that confirms the link between those versions of Safari and the PayPal SDK, in our case, causing payment errors due to a null paymentMethodNonce error on a WooCommerce store. It's been a long and painful journey but if this is only linked to that specific version then hopefully it'll ride out. We cannot replicate the error directly so we are relying on live failures which is painful to experience. We hope a patch is rolled out soon!
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