Soraka E Silence affected by tenacity, which does not match the description

This might or might not be a bug, but as it stands now tenacity apparently affects Soraka's E Silence as well (not talking about the root here). However, this is weird, since the tooltip states that that enemies are silenced until they leave. It wouldn't make sense for this not to be true either, as the animation is still there, making you think the target is silenced, whereafter you suddenly get kicked in the face. If this is intended then I find that to be weird, as that would promote inconsistency in gameplay, I.e area silences whomever comes onto it, but not always being silenced while on it. That would be like saying you could walk through J4's cataclysm walls after a certain duration (though this doesn't fall under CC, but you get where I'm going, hopefully).