WP8.1 TouchKeyboard capital letters

Hi, I have a problem with touchscreen keyboard on WP8.1 (Unity 4.5.5). On the first look everything works fine, keyboard appears when I want to, I can read letters and so, but nevermind how many letters did I write, keyboard still sends only capital letters. If I want to write small caps, I have to shift it down before every touch.
Is there any solution to this? To me it looks like the keyboard thinks it wrote the first letter of word all the time and since keyboard.text does nothing, I have no idea how to tell it the contrary.
This does not look like a big problem, but it is quite annoying when writing passwords etc.

Thanks for any help

Sounds like a bug, can you report it?
Thanks.