So far i saw that if i disable the workaround by setting the boolean "m_remote_control" to false the qwerty keyboard work but the initial issue is back, the one with numerical input text.
That is the issue at hand, yes.
I wonder if there was any other issue reported at that time, or if there exists any extra infos which can help me to fix this?
No, this is exactly the problem. How to make a standard remote use the SMS-style input, while the qwerty remote use the alphanumeric input?