Hi, as of recently our players can add more diesel than defined in the plugin config. It is set to 15, our stack size is 1000. It adds 15 diesel but they can add more until the global stack size is reached. 

We use StacksExtended; is there a way to make it work again, please?

https://imgur.com/6JvLzbG

StacksExtended probably override the stack size for containers.
Looking at the plugin page there seem to be some settings for stacksize in containers.
I would suggest to disable the stack size of the excavator plugin and configure the function in StacksExtended.