I debugged this to the point where I see that every now and then the webhook is not added to the table that is read in (and then fired) by the CRON job.
But, for me, things work fine now since upgrading to WordPress 4.7.4 and WooCommerce 3.0.8. It’s maybe 0,5% where it doesn’t get fired when it once was 50%. The webhooks fire way slower than before (takes up to three minutes) but it’s very reliable now.
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This reply was modified 7 years, 4 months ago by riyadhyaseen.