Because they devalued the forint this summer, so everything is now about 7% cheaper.
Well, they didn’t actually devalue it. No. I mean, that would imply there had been a… devaluation. Ha ha, how silly. No, what happened was that the Bank of Hungary moved the band in which the forint was allowed to float freely. Whereupon the forint freely floated down from around 250/euro to more like 275/euro. So, it was a sudden fast downward change in the value of the currency caused by central bank action. Which is not a “devaluation” at all.
(The forint lost about 10% of its value in a month; you can see the graphic here. It has since clawed back about a third of that loss. Still, a Euro will go about 7% further than it would in May, and about 10% further than in March.)
Nobody seems to have paid much attention, but I think there are some points of interest here.