Simple queue turn into red color and Dynamically don't update

Hello All,

I have a CCR-1036-8G-2s+ with 1000 PPPoE active users and 600 active Hotspot users with DMA Softlab Radius Manager. In simple queues, I see several entries are in totally in red color. All other entries avg upload and download rate dynamically change but these entries.It is happening with only PPPoE entries. I am wondering if I am overloading router. I have attached screenshot. Can somebody please suggest me whats going on with CCR?

Look at radius stats, maybe the radius server it slow replying?. ROS version?