Issues possibly with WordPress 5.4.1

I have been trying out the split plugin and its brilliant, but I think errors have occurred since the latest WordPress Update.

when I add one backorder and one normal order to the basket the completion page now shows the back order equals ￡0.00 and when the order comes through the split backorder items is showing no product in it and value equaling ￡0.00.

If I order just the backorder, it comes through fine and even if I order 2 backorder products.

I can’t remember now but I’m sure ordering a backorder product did show it was in order completion, I don’t get that any more.

I would really appreciate any guidance.

Thank you Vicky

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