[4.1 Patch Bug] - Teemo R bug make cross highlight in shadow

hi everyone, i just want to report a bug, sorry if i post this wrong topic and for my bad english :P , it's happened since 4.1 patch, i have played some game with teemo, and while i planted some shroom, it will make some "cross highlight" in shađow. i'm not sure this bug make by teemo shroom, but it happened in most game that have teemo. hope riot will find and fix that i'm playing on Vietnam garena server, not NA, using our diffence client here is some picture about this bug