Rings of Brighthearth + Basalt Monolith copied untap does not untap

[matthewevans]

Discord report

Rings of Brighthearth copies Basalt Monolith's untap ability, but the copied ability does not untap Basalt Monolith. The original untap ability still works, so the loop nets zero mana.

Source: https://discord.com/channels/1485498006781427802/1514235926304522251/1516763011879145616
Report IDs:

• discord:1514235926304522251:1516763011879145616:0
• discord:1514235926304522251:1516763114421354669:0

Oracle text (verified from client/public/card-data.json)

Rings of Brighthearth:

Whenever you activate an ability, if it isn't a mana ability, you may pay {2}. If you do, copy that ability. You may choose new targets for the copy.

Basalt Monolith:

This artifact doesn't untap during your untap step.
{T}: Add {C}{C}{C}.
{3}: Untap this artifact.