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January 3, 2020 at 7:09 am

Hi Daniel,

The filter is still working otherwise the payment method wouldn’t load at all, why it’s not firing on the initial page load I’m not sure yet but just wanted to confirm I can reproduce this so will be investigating further to see what is happening.

January 9, 2020 at 5:42 am

Yeah, I’ve found the cause and its painfully obvious now I know what it is (as they usually are).

Checkout now loads the payment methods over ajax and ajax requests return true for is_admin(), meaning the !is_admin() check that was on line 10:

https://gist.github.com/Pebblo/f952f806aec55df5f8a1#file-ee-site-specific-plugin-php-L10

prevented the invoice payment method from being loaded on the list of available payment methods when loaded over ajax, the validation then checks the submitted value against the available payment methods (which again at that point does not include ‘Invoice’) and returns an invalid input has been set.

The ‘refresh’ view of checkout isn’t loading them over ajax, it’s loading directly over the request which is why it shows when you refresh, but you get the same issue when you submit.

I’ve updated my snippet and simply removed that check, the Invoice payment method now loads and submits as expected for me. I can’t recall why I added that admin check originally but the section that loads payment methods in the admin, doesn’t use that filter as it just loads all payment methods anyway so this should cause any issues but it would be a good idea to confirm (I did some testing and didn’t run into anything).