Arcanist Pet Bar Bug?

Time: since patch 3.3

Frequency: always

World name: Gilgamesh

Character name: Argo Nak

Class/Level: Arcanist/25

Party or solo: Solo

When I'm on my arcanist and his pet is out, hotbar 1 turns into the pet hotbar whenever he dismounts from a chocobo porter (tried the stops from Gridania, Buscarron's Druthers, Camp Tranquil, Drybone, Black Brush Station, Ul'dah, and Horizon, as well as dismounting in between stops.

Dismissing the pet seems to reset it back to hotbar 1 instead of the pet hotbar, but if I don't dismiss the pet, I can't get hotbar 1 back, even using the HUD configuration tool.