FPS drops to Warzone?

I played normal warzone in the last few days. But when I open another game I got fps drops. Before that, I was able to play Fortnite, CS GO and Valorant completely smoothly. But after I played Warzone, the fps always drop in the other games, frankly I have no idea what it could be. Have 2 × 8 Ram AMD Radeon RX 5500XT a Rayzen 5 2600 processor and an MSI B450 motherboard

Just a guess, but can it be that Warzone draws so much power that CPU and co are automatically throttled after a while in order not to overheat?

The temperature of the CPU in Warzone was relatively normal (68 degrees)

Then unfortunately I can't help you either: /