[1.11.2 live assert] This entity doesn't have a region right now

[1.11.2] Assert in world using custom add on entities pops up from loading them.

Assert reads:
[ERROR SYSTEM 4488] Assertion failed: This entity doesn't have a region right now
Condition is false: mRegion
Function: Actor::getRegion in f:\darwinwork\12\s\handheld\src\common\world\actor\actor.cpp @ 3844

Repo steps
1. Load up a world with custom add-on entities spawned in.
2. Load entities until assert pops up.

Error Log lines near crash:
[VERBOSE ENTITY 4488] Loading entity: imagiverse:npcshop
[ERROR SYSTEM 4488] Assertion failed: This entity doesn't have a region right now
Condition is false: mRegion
Function: Actor::getRegion in f:\darwinwork\12\s\handheld\src\common\world\actor\actor.cpp @ 3844
[INFO PLATFORM 12228] AppMain::OnWindowActivationChanged, state 'Deactivated'
[WARN SYSTEM 12228] MinecraftGame::onAppFocusLost: 0
[WARN SYSTEM 12228] MinecraftGame::onAppFocusLost hasFocus = false: 0
[INFO GUI 12228] Created 'pause.pause_screen' screen in 1.523200ms
[INFO INPUT 12228] Controller 0: Pushing input mapping: 'screen'
[INFO TELEMETRY 12228] Screen changed to pause_screen