Pet hotbar settings restores to default upon HUD switching

Date & Time: Any time. Continues for at least 2 months...
Frequency: When HUD layouts changed
World name: Zodiark
Character name: Zero Setsuna
Class/Level: 70
In-game time: Any time
Area and coordinates: Anywhere
Steps:
1. Go to Character Configuratiom -> Hotbar Settings -> Display -> Pet Hotbar Display Settings -> Set Pet Hotbar Auto-Display Settings to "Display only hotbar 1". Close Character Configuratiom menu.
2. Either go to System -> HUD Layout and switch between different presets or use hotkeys for HUD presets.
3. Pet Hotbar Auto-Display Settings returns to default "Display only pet hotbar" value, so you have to change it manually every time after you changed your HUD.