Not sure if this is worked as designed or a bug.
The documentation explains:
From the Low stock activity dropdown list, select the action to be taken when the stock quantity falls below the minimum stock quantity value.
When minimum stock quantity is 1, falls below means when stock quantity will be under 0 (below 1)
However, the low stock activity is actived when stock quantity reaches the minimum stock quantity
Is this a bug or an error in the documentation?