Problems with QTableEdit, QLineEdit, QPlainTextEdit in High-DPI / Upscaled Windows

Running my application on a screen with higher DPI, which is set to 125% in Windows 10's display settings, causes frame lines to go missing.

Reproducible in QT Designer:

• set screen zoom to 125% in Windows settings
• call designer.exe
• new widget
• place a QTableWidget on the widget
• move the QTableWidget around on the widget (arrow keys, e.g.)
• some lines appear or hide, depending on where the widget is

Same happens with other controls, too.

Workaround is to set a style on these widget (border 1px solid black or similar).