I've seen this too, though didn't make note of exactly what triggered the bug. I'm also on PC.

ISP:
AT&T

Type of Internet Connection:
DSL

Internet Connection Speed:
3 MB/s

Date & Time:
N/A

Frequency:
Intermittent

Character Name:
Baelari Khalahko (Sartaganas)

Race:
Miqo'te - F

World:
Sargatanas

Class/Level:
Miner, Botanist

Area and Coordinates:
Various

Party or Solo:
Solo

NPC Name:
None

Monster Name:
None

In-Game Time:
N/A

Steps:
Use Preparation, go mine things.