Interesting that. I am Chief Range Officer at two Australian State championships & it's amazing how many more F class shooters crossfire on ETs. I put it down to two things:I shot fast the first day at Lodi Nationals. With the cross fire I came in dead last at high master class.
(1) They don't have a spotter on a target to help then identify it as theirs, which leads to
(2) Fclassers seem to bump their back bags a lot when viewing their results/monitors, leading to a crossfire next target left (for right handers).