What is happening:
Merchant window remains open and functional at extreme distances. Buy and sell functions both work. This could easily be abused.
What should be happening:
At a certain distance, the merchant window should close automatically.
Steps to reproduce the issue:
Launch game, log in as normal. Select character. Find a merchant (any character with the "shop" interaction option). Open the shop dialogue. Move away from the merchant. Attempt to buy or sell items through the interface as normal.
Game client version:
Windows 7 64bit
Crash logs or exceptions generated:
https://youtu.be/L5To81HSVTk (only one example, but this works with multiple vendors).