Hi,
it is the ipay88 plugin, although it’s the one downloaded from ipay’s dashboard, which I think is slightly different to the one you linked to. Although I haven’t compared them recently, when I first signed up, the public one had problems, so they directed me to the internal one.
As far as I can see the payment was completed immediately on the 26th, it seems more of an internal woocommerce thing not happening.
anyway I’ll open a ticket. Thanks