There is no such thing in any rule book as a pause.... It states, even in the IPF, motionless. Which it was...... No matter how brief.
The foot slip could be missed in any fed, I've attended PA comps where a BIG record was broken on the bench with his head up AND a dip into the chest after the press call.... Mistakes happen.
The spotter should have moved, he should have been red-lighted for that, but Im talking about the actual bench, not the technicalities.