No. Literally the boxes were there, or at least something in the background of the speech bubble that was in the shape of a box, but they couldn't be dragged around nor did they disappear when clicking on the image. I've seen it in some other strips in other series as well.
*sliding door shut*MASTEEEER!!Master!MasteeerMaster!?Try not mess up the room too much~Myo~n♥AAAA!!Myon?Nfufu~ Uron-hyan kaahi~ resu~ "udon-san you're so cute~" the japanese should be "udon-san kawaii~ desu~" *sob*
*sob*
*sob*