OSK inserts display-text vs text difference to web textfields upon cursor move and key press

Hello,
I've noticed many times now (ever since there are auto corrections present in the web browser) that when editing a text field in a web browser - for me usually gmail message composer (I haven't seen this in native apps yet) - the word I just wrote gets inserted to the text upon moving the cursor to a different place and start typing again.

That is:
1. Open something like Gmail and start composing a new email message
2. When you have a "few words" written, before you type space after the last word, click to a different position inside the text to move the cursor elsewhere
3. Start typing (anything)

In most cases this results in the insertion of the last written word (that was in display-text property but not in the text property - that is if this is similar to QML TextInput) inside the text on the current cursor position.

This is definitely an unexpected behaviour and makes editing while while composing a message really painful.

I am on rc-proposed, MX4.
Thank you very much for looking into this.