Requesting "Always" location access, rather than "While Using," is held to a higher bar — the app needs a real, disclosed feature that requires continuous background location, like navigation or a location-based safety alert, not just analytics convenience.
Frequently caused by requesting background or always location for a feature that could reasonably work with foreground-only access instead.
"Your app requests 'Always' location access, but continuous background access does not appear necessary for the app's core functionality, per guideline 5.1.5."