Uppercased letters in TextInput on Android

All first letters in every word that typed in TextInput field become uppercased on some Android 4 devices. This behavior appears in 5.9.4, 5.10.1, 5.11.2 versions of Qt. In 5.9.3 all characters were lowercased (even first letter of the sentence).

To reproduce this you need an device with android 4 (4.1.1 in my case) and minimal qml project with TextInput. Every First Letter Of Every Word Is Uppercased When You Type On Standard Keyboard.

Some reports from Android 8 and 8.1 were received with same error.

With Qt 5.11.2 all letters become uppercased  (JUST LIKE THIS) on some devices.