The bug implementation process is as follows:
1. Open more than 3 applications casually. Click the Home button and return to the main screen .
2. Double-click the Home button, open the application switch and close the interface. (Figure 1 shows that the clock is the last application)
3. Make sure that the last application is in the One-third position on the right side of the screen . (Figure 2 where "clock" is located)
4. Press the last two applications ("Weather" and "clock") with two fingers to push up, and the "clock" with the icon still appears, but the UI has disappeared. (Figure 3)
5. Can slide left and right as shown in Figure 4, can also be pushed up close. (at this point back to the main screen, and then press the home button, "Clock" UI back Again)
Figure 1
Figure 2
Figure 3
Figure 4
The bug was successfully tested on the iphone 5s/ios 7.0.3.