Stats API /api/v2/stats/queues/realtime returns stale data?

Hitting /api/v2/stats/queues/realtime with the queue IDs but the waiting count is way off compared to the admin UI. Is there a cache delay I’m missing or do I need a different endpoint for live observation? The response looks valid but the numbers are from 5 mins ago.

GET /api/v2/stats/queues/realtime?queueIds=abc-123
200 OK
{
 "items": [{
 "id": "abc-123",
 "metrics": {
 "waiting": 0,
 "available": 12
 }
 }]
}