The local farmers came with 1000l+ tanks for diesel, foreigners with multiple gas cans, etc., and the local logistics couldn't handle the pressure.
Foreigners were coming to Slovenia just to buy gas? In such quantities that it strained infrastructure? That definitely sounds like something that happened. As if "multiple gas cans" wouldn't still be well under the 50 liter/day limit.
>In Slovenia, this has resulted in so-called "fuel tourism", as drivers from neighbouring countries, particularly Austria, take advantage of the lower, regulated prices here.