Some time ago, several Kosovo police officers who crossed the border were arrested by Serbia, and after NATO pressure, Serbia finally released these policemen, and recently Serbian President Vučić's son Danilo North Kosovo Police was arrested, which was seen as retaliation some time ago.
Since the outbreak of the Russian-Ukrainian war, the Kosovo crisis has become more prominent. Russia is mired in a war and cannot give Serbia enough support, and Kosovo apparently sees this, and with NATO support, it frequently provokes disputes.
Under NATO oppression, Serbia repeatedly tolerated and wanted to send troops to protect its interests, but then NATO forces cut off Serbia's road to Kosovo in the name of peacekeeping.
Serbia has always been close to Russia, and in this Russian-Ukrainian war, Serbian people also formed a volunteer army of hundreds of people to enter Ukraine to help the Russian army fight. And the reason why NATO frequently puts pressure on Serbia is also to reverse Serbia's position and force him to stop supporting Russia.