I completed these Mercury missions on a previously deleted character, and I can't re-run them (once per account).
29. Signal Light (Mercury)
30. Not Even the Darkness (Mercury)
They aren't showing up as complete in the triumphs and I cannot rerun them. Halp! :)
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Hello, and thank you for your report. We are investigating player reports of Moments of Triumphs not tracking properly. Progress toward Triumphs and event rewards may be lost if players delete any characters on their account. For the best experience, it is recommended that players do not delete any characters until all desired rewards have been redeemed, and Solstice of Heroes concludes on August 28, 2018. For more information, you can view our [url=https://www.bungie.net/en/Help/Article/46969]Moments of Triumph guide[/url]. Please let me know if you have additional questions.