Interactable 3D HUD. Sort of

Inside Character blueprint i have placed ball mesh. And parented it to camera. The we created blueprint script that allow this ball to move up and down like slider with mouse control, while still remain atached to main character mesh.

And now there is a problem. Ball with in character blueprint, dosent move the same way as the ball with seperate actor blueprint.

After i Left click on ball, it jumps over mouse and contiue moving even thou i released the button. And when i lower the mouse to ground level ball hits invisible wall. If i drag mouse all the way out to task bar. it jumps to next lower position. And if i place mouse over wall hight level it jumps to it original place.

How to make proper movement of the ball.