Strange / double order numbers with 'automated numbers' plugin?

[ynniq]

Hi,
We're using the Automated Numbers plugin to modify the order number and invoice numbers. Works fine. Only that since a few weeks (right after we updated VM from 4.2.4 to 4.2.6.) we sometimes notice that orders are created twice, only one minute apart. It has the same items, and one order number will be 2024-03-00015 (which is correct, just as indicated in the settings of the plugin) and the second one will have 2024-03-16 (the leading zeros are missing here??).

Anyone who recognises this issue? Or has a solution? Could the VM update cause the problem?