The issue below has been confirmed.
We are currently investigating the issue and working to address it.

【Confirmed Issue】

■ In Cinder Drift and Cinder Drift (Extreme), if the Ruby Weapon's HP falls suddenly to 1 with a powerful attack, in rare cases the Ruby Weapon's HP may not deplete any further.

We apologize for any inconvenience this may be causing and thank you for your understanding.

*Edit (Feb. 26, 2020 6:00 a.m. PST / 14:00 GMT):
Regarding this issue, after addressing instance World servers one by one, the fix has been reflected on all instance Worlds on Feb. 25, 2020 8:44 a.m. (PST) / 16:44 (GMT).
We apologize for any inconvenience this may have caused and thank you for your patience.
Please follow the link below for details:
NA: https://sqex.to/foGN6
GB: https://sqex.to/E1nHj