Azerbaijan is afraid that Nagorno-Karabakh will follow the Kosovo example and declare independence. Armenians are conflicted, knowing that the Kosovo declaration with EU and US support is a violation of UN 1244 and other agreements, and Armenians are sympathetic with the Serbs. The two situations are very similar. Albanians have used deceit, ethnic cleansing and mass murder to seize Kosovo. Azerbaijan used deceit to get Stalin to gift the Armenian provinces Nagorno-Karabakh and Nakhchivan to them, and in the 1990's ethnic cleansing and mass murder.
Kosovo is Serbian. Nagorno-Karabakh and Nakhchivan are Armenian.