I figured it might be an old Solidus issue as well as the PayPal problems, so we moved to Rails 6 and Solidus 3 in hope it’ll fix both, and unfortunately neither are working still

Does the order actually exist in your DB? If not, then you’re probably rolling the order back in a transaction block. If it does, then the order probably isn’t completing properly (it has a “complete” state but no “completed_at” date). In both cases, it means an error happened at some point when the order was trying to complete.

Thanks Sean, will look into that