Mining Level 70 nodes in Amh Araeng counts as Stormblood

When mining level 70 nodes in Shadowbringers / Amh Araeng, it falsely counted those nodes mined towards and gave me the Mining Stormblood achievement.

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Date & Time: 2019-07-27
Frequency: Occurred once
World name: Zalera
Character name: Foodle Faddle
Retainer name:
NPC name:
Monster name:
Class/Level: 71
Party or solo: Solo
In-game time:
Area and coordinates: Amh Araeng 31.3, 21.8, 0.8
Housing:
Steps:
1. Earn the Achievement "Mining Stormblood" --- in a Shadowbringers zone????

*Add more steps if necessary

Connection Specs
- Type of internet connection/provider: Google Fiber
- Modem maker/model number: Google

■ PC Specs

To obtain the system information, open the FFXIV launcher and select Config → System Information → Display.

Not relevant this is a gameplay issue?

It's a 70 node. Which is what the Stormblood achievement specifies. The Shadowbringer one needs at least a 75 node for procs. It was the same for Heavensward.