Not sure if bug or not

Looking through logs and I am seeing some low % on everyone. Is this due to us wiping or what causes this to drop so much?

https://www.warcraftlogs.com/reports/k7mzyBnNJW4YK28g#fight=1&type=damage-done

You’re logging without Advanced Combat Logging enabled, so boss percentage can’t be computed. Network Pane of System preferences in-game.