I could be wrong, and please feel free to correct me if so, but wasn’t dropping DEs into coverage a large part of Rex’s defensive scheme? For some reason I think I remember Mario Williams complaining about it.
anyway, if Jackson dropped into coverage when he should have been holding contain, either that was a communication error, or he simply made a bad read. That feels like a good teaching moment for a guy making his first start if it’s his mistake. Otherwise, clean up communication issues.
if that was Bernard’s job to come up and hold contain, yikes.