Kermovan Pier supply point. There is 4.000 total supplies, divided in three containers/supply places. Two of them are next to each other (image 01).
When trying to access the containers via the signs, both signs wrongly show the supply amount of the left one (image 02 and 03). The supplies from the right container can only be accessed with the "load" action on a vehicle.
Reproduction: empty one of the two via drag and drop, go to the other one and try again (the second sign will say it is empty, when its not).