Plugin must be reloaded after server restart and all vending machines need to be repaired daily after manual reload of plugin. is there a fix for this?

This is the first report of the issue, so there is no fix available. I will see if I can reproduce it, but I suspect this is an issue specific to your server given that there have been no other reports yet.

If I cannot reproduce the issue, which we should assume at this point, then I will have to work with you to troubleshoot and determine the root cause. Initially, I will ask you some questions in order to fully understand the symptoms. Based on your answers, I can generate hypotheses which we can test.

When the server boots and you open a vending machine, what exactly do you see? For example, do you see the edit button? Do you see the reset button? When you click edit, what does it say is the vending machine's data provider?

What do you mean when you say that vending machines must be repaired? Do you mean that customizations you saved previously are not applied to the vending machine, therefore requiring you to reconfigure every vending machine?