I think those are actually wasps. It's particularly common in countries like Germany and Luxembourg where native wasps are protected species. As for Poland and other parts of Europe, it's hard to keep them out when you keep the doors propped open in lieu of central AC (and they're attracted to the fresh sugar), and wasps and bees don't transmit disease anyway, so people just get used to them

I'll never understand why people call wasps "bees". They are extremely different. It's like calling deer "horses". Why is this a thing?

those are wasps, unfortunately,

I'm wondering the same thing.