On Ubuntu 22.04, I compiled qt-everywhere-src-6.7.0.tar.xz and used the following line in my program to enable the Qt virtual keyboard when input is required:
qputenv("QT_IM_MODULE", QByteArray("qtvirtualkeyboard"));

However, I encountered an issue where the keyboard automatically retracts after popping up when touching an input field. This behavior only occurs in a touch environment.

By monitoring Qt.inputMethod.visible, I observed that it changes to true and then immediately back to false. This issue can be reproduced at https://plcnexttest.phoenixcon.com/ehmi/hmiapp.html

1. Navigate to Dialogs -> dialog login.
2. Try entering the username and password.