RInterp To not working for FPS cam

Hello, guys. I’m working on a FPS char with odd mouse control. Instead of ordinary ways of rotating FPS camera with mouse, I want the camera to aim to the points in space where I click with middle mouse button.

I’ve manage to get it working with “Set Control Rotation” and “Get Hit Under Cursor by Channel” nodes. Now I want the camera movement to be gradual between the clicks. I’ve found the “RInterp To” node is the way to go, but it’s not working. It doesn’t matter the values I put in “Delta Time” and “Interp Speed” inputs, the camera keeps changing from one direction to another with no gradual transition.

Any ideas? This is my actual blueprint script for this:

https://imagizer.imageshack.us/v2/1245x408q90/673/iTgsfj.png