Not only Poland, they have jammers around St Petersburg as well which affects Finland, there have been reports about boats losing GNSS reception in Swedish waters, etc. This has been going on for years.

Don't worry though, it's been condemned in a sternly worded letter: https://www.icao.int/news/icao-assembly-condemns-gnss-radio-...

Why wouldn't it?

The behavior will continue until a consequence is imposed.

Not on regular Russians, mind. Their ruling class. They're still free to move about the continent, make investments, do whatever. Currently Europe seems to be more interested in breaking away from the US than dealing with the power that has killed hundreds of thousands on their own continent.