Rek'Sai Tunnel vs Wards

During an AI match to test my lag, I decided to play Rek'Sai because I haven't used her in awhile. I found a glitch where if there is a ward (ally ward or visible enemy ward) over one of the entrances she's unable to enter the tunnel through that entrance.

An enemy ward I can kindda understand, but an ally ward? I feel that this is something that needs fixed at some point because if a troll knows about this they could severely screw over their allied Rek'Sai.