Why does the Xiaomi 15 Ultra freeze when I open a small window to view the third-party app while playing games?

Thank you for your support of Xiaomi products. The Xiaomi 15 Ultra has undergone strict professional inspection before leaving the factory, so you can use it with confidence.
The reasons for the freeze of the phone are listed below:
1. When running in small window mode, third-party apps are not optimized and cannot smoothly adapt to different screen sizes and operation methods, which will cause lags;
2. When there are too many applications running in the background, opening a small window will cause lags;
3. When the phone memory is low, the experience will also be unsmooth when opening a small window.