Calling the presentViewController method of UIView in the OC after you enter Chinese will crash

This problem was discovered in my project. I realized the photo taking function through OC. However, when I filed Chinese words in Textfield and hid the keyboard, then called the photo taking function, the application would crash.

Attached is a project I created, adding TextField and MessageDialog in main.qml, and then running it on iOS13.5.1 device. After startup, I tested the following two input contents:

1. Enter the number in the input box, hide the keyboard and display the information box, and the application works normally.

2. Enter Chinese in the input box, hide the keyboard, display the information box, and the application crashes (iOS12.3.4 has no such problem)

Please help to solve, thank you!