Assassin’s Creed Valhalla recently received title update 1.04, which provided numerous bug fixes and improvements for all versions. As you can imagine, those people taking advantage in the new generation with Xbox Series X / S and PlayStation 5, they were also able to download and update the said patch. However, they were able to see how the game deteriorated.
Although the version for PS4, Xbox One X, and Xbox Series S appears to be working fine, in Assassin’s Creed Valhalla for PS5 and Xbox Series X performance worsened. Among the most significant problems that have been discovered, drop frames have been recorded at varying intervals, reaching 40 frames per second
Some users recommend against updating the game if it is enjoyed on new generation consoles. To do this, you need to stop the update when it starts, and deactivate the “automatic updates” option
Source: GamingBolt