It's insanely hard to use Bard's tunnel from the top-down view

What I mean be top down is that when you create the tunnel going through a wall "down" (towards the blue team) it is very difficult to click into the opening and sometimes Bard won't enter it no matter how I try to reposition myself. I have no trouble entering when I'm using the portal from the bottom up (blue side to red side) For example, If I would open a portal from inside dragon pit down into blue's jungle (near Red buff) that is when I have trouble. Going from baron to red team's red buff or going from red team's blue buff to wolves, etc is no problem at all. Could you make the entrance box a little larger?