I watched this afternoon only to have a look at what some on here suggested could have been a rag sending off, but that offside, is it just me or did the var lines appear to be drawn far from parallel to the cut of the grass? Using the nearest grass parallel, behind the players, it seemed like the line started at ~2m from grass cut near side, and managed to be only 1m or so from the grass cut far side, therefore suggesting onside within the 'triangle' created!
Perhaps my trigonometry is just having another off-day!