Group Pose Error When Dozing On Bed

Date & Time: October 11, 2017
Frequency: Always
World name: Excalibur
Character name: Shima Kyaro, but applicable to all characters across all worlds
Retainer name: N/A
NPC name: N/A
Monster name: N/A
Class/Level: N/A
Party or solo: N/A
In-game time: N/A
Area and coordinates: Any /doze-able bed
Housing: Yes?
Steps:
1. /doze on bed
2. /gpose
3. Error, "The command /gpose is unavailable at this time."

This wasn't the case before the patch, and it's undocumented if it's a legitimate change. I know myself and other players have used /gpose while dozing on beds to take some nice screenshots, and it's a functionality that will be sorely missed.

I'm going to hope it's a bug, but if it's not, can we get a clarification on why it's been disabled?