'Set Ignore Look Input' delayed response

I’m experimenting the same thing in C++. I had a solution working under 4.4 and now with 4.5, I can’t anymore.

[Edit] It may still be the case of the left-click game enabling: Bug with mouse control of game in editor? - Programming & Scripting - Epic Developer Community Forums
If I press down the right mouse-button to hide the mouse cursor and get rotation control AND left-click to enable the mouse cursor in the game, then the right-button rotation works a full 360 degrees and is not blocked by the edges.