https://www.gamespot.com/articles/destiny-2s-prestige-raid-exploit-fix-delayed-but-t/1100-6454046/

Earlier this week, Bungie announced that the higher-difficulty version of Destiny 2's Raid was delayed eight days due to an exploit it discovered. The exploit would've made it impossible to know which team legitimately completed the Prestige Raid first.

Today, Bungie stated that the fix for the exploit won't go live in time for the Raid's rescheduled launch. However, the Raid isn't going to be delayed again--Bungie found a way to verify that teams did not use the exploit to complete the Raid.