The Diablo 4 Anniversary March of the Goblins has gone live, but players are beginning to notice that level 100 Goblins are dropping low-level caches, such as Treasure Bag. Since all enemies above level 95 should exclusively drop 925 gear, this is an issue.
Luckily, Diablo 4 Global Community Development Director, Adam Fletcher, is aware of this issue affecting players, and has stated that the development team is looking into it.