HXM Rooftops

For now there is nothing to do about it, since it's up to the developers to fix this issue.
The only thing you can do is save the replay and report them.
Me personally, either I screw with them by trying to block them or I remind them that it's a bannable offence to glitch. If they continue to use the glitch I report them, but most of the time when I give them the "warning" they stop exploiting the glitch.