Not A Bug Kinnan, Bonder Prodigy + Relic of Legends

[tut]

Screenshot or Video

1. 1 or more

Tapping a legendary creature with Relic of Legends while a Kinnan is on the battlefield only adds one mana of the selected color

Should have looked at gatherer for Kinnan first, this is not a bug. Intended behavior, sorry.
"You’re “tapping a permanent for mana” only if you’re activating a mana ability of that permanent that includes the {T} symbol in its cost. A mana ability produces mana as part of its effect."