New plugin causes various problems

I have reported this to Trust payments, but recording here for the benefit of other customers. I have installed plugin version 1.1.2 and the following errors arise:

When Enable Url Notification is checked, customers are not receiving “order processing” emails, when unchecked, they get sent again. I’ve had to manually send hundreds of notifications to my customers today. (true 100% of the time)

Under some circumstances, blank orders are created in WordPress right after a successful order – completely blank, as in no details at all other than the same date and time as the successful order. (3 in the last 24 hours)

Still getting orders arriving occasionally in Myst with no customer name attached (3 in the last 24 hours)

I get the feeling the whole communications architecture used by this plugin needs a serious review, it’s just not at all robust.