Why doesn't Huawei's mobile phone work when it has a suspended window?

We want to turn on the floating window function of the mobile phone application. Let's turn on Huawei's mobile phone settings, as shown in the figure.

Please click to enter a picture description.

On the Huawei mobile phone settings page, we press Permission Management, as shown in the figure.

Please click to enter a picture description.

On the mobile phone rights management page, we press the rights, as shown in the figure.

Please click to enter a picture description.

In the hand permission interface, we drop down the interface, see the floating window, and click it, as shown in the figure.

Please click to enter a picture description.

We can see that only seven applications are allowed to open the floating window function, and find the application we want to open the floating window, as shown in the figure.

Please click to enter a picture description.

Bian Xiao takes the floating window opened by screen recording software as an example, which can be opened, as shown in the figure.

Please click to enter a picture description.