Interesting law was announced in Poland few days ago (15.07). Again regarding crossing the border Poland – Ukraine.
Sounds like that: if you are going from Ukraine to Poland and have Ukrainian passport (even if you are living and working in Poland), you need to stay 14 days on quarantine, but if you have EU passport, you don’t need.
For me, like for all Ukrainians living in Poland it sounds completely crazy. Just related to citizenship, not to overall risk. Just politics, nothing related to Coronavirus.