Mouse over causing giant squares instead of highlighting character

As shown in the attachments, when mousing over enemy or friendly units (minions, champ, turret) it causes a large red/blue square instead of highlighting that unit. This is only for unselected units, when selected the bug goes away and starts on all other units. Sometimes tapping tab or escape gets rid of this for a short time, but it always come back in the same match. Running core i7 and gtx 860m in a Lenovo Y50, not that this does not happen to my other desktop PC (AMD 8350/ GTX 660 Ti 2x SLI) and only started this patch, it worked fine previously. I already tried repairing the install and no luck, any ideas?