What is happening with player's balls this season?

Union of European Football Associations is one of six continental bodies of governance in association football. It governs football, futsal and beach soccer in Europe as well as Israel in Asia and the Eurasian transcontinental countries of Russia, Turkey, Cyprus, Azerbaijan, Armenia, Georgia, and Kazakhstan.

Image Credit: https://www.sciencedirect.com/science/article/pii/S2214442016302509