QNetworkManager does not escape "+" symbol properly

As far as I've searched there is no reason for this. In my program, Qt sends POSTs requests to a web server.
The problem, if the text field I try to send contains a plus symbol, I ends in the database as an space (" "), I think the plus symbols are not being transformed to "%2B", and when the request arrives at the server, apache transforms the plus symbol into a space (" ").

As you can see there is nothing unusual in the example.