Investigating duplicate orders in Gridbox. For developers.

I've reported this issue more than four times already =) and it still hasn't been fixed. Now that I have a little more time, I decided to tinker with the neural networks and track down the problem. Well, I think I've found it. I ask the developers to read this issue and help me fix it, so I don't have to mess with gridbox itself.

It might be related to Robokassa, or it might not. I haven't seen any reports from other people. But my store sometimes has a very high order flow, and people order 2-3-4 items in a row in separate orders, and this is a very critical issue for me. And overall, there's clearly an issue with the cart cookies in the order logic.

Below I attach a PDF in Russian and English.
ENG:
https://drive.google.com/file/d/1I1NWfn9vEfDYq5qy0N132ihkH7pBm3OY/view?usp=sharing
RUS:
https://drive.google.com/file/d/1OVsxKaHoJvAGvooRSOtctkdNI7d0Rxu0/view?usp=sharing

Solution before the official fix:
Not yet =(

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