Hello there,
Thank you very much for the report. I'm sorry to hear that you are having trouble damaging Fikrul in the second damage phase. We've received reports of this issue and are investigating the underlying issue further. To review any Known Issues, we recommend viewing them on the following [url=https://help.bungie.net/hc/en-us/articles/27062192032404-Destiny-2-Year-7-Known-Issues-and-Vital-Information?_ga=2.253677134.658450834.1731968016-193566395.1731968016]Page[/url].
For any updates on this issue, we recommend viewing our Patch Notes as they become available, posted on the [url=https://www.bungie.net/7/en/News]News[/url] page.