What was the controversy over Siliva's loss to Boginskaya at the 89 Europeans AA on?

I am just curious since I havent seen this event in its entirity. It is interesting Boginskaya was outscored by Silivas on vault (unexpected) and still came back on the other events, the same 3 events Silivas would win gold at both the 88 Olympics and 89 worlds, to win. Is there a specific score or reason for the controversy though?

What was the controversy over Siliva's loss to Boginskaya at the 89 Europeans AA on?