Loiter in Nooploop UWB indoor position is not accurate

Hi
I currently use Nooploop UWB for indoor Non-gps positioning
The following is the configuration of my aircraft
Flight Control: CubeOrangePlus
Firmware: ArduCopter 4.5.0
Nooploop: Four base stations, about 10m*10m square area

When I use AltHold mode, it is ok. Once I switch to Loiter mode, the aircraft will slowly drift away in one direction. The drifting direction may be any direction. The following is the Log file of several flights. It seems that Nooploop is in The aircraft’s position was not constantly updated during the flight.
However, when I was disarming the aircraft, I tried holding the aircraft towards four marked points. MissionPlanner showed that the aircraft position was moving, but the actual flight did not have the precise positioning effect of Loiter.
Is there anyone who has used Nooploop UWB or indoor positioning who can help me answer this question or give me some direction?

This is Log
https://drive.google.com/drive/folders/1LDgcMYXbyt-dsg2Fc1ZhHNDPOuQx8IH-?usp=drive_link

Hi,

I am trying to setup a NoopLoop UWB indoor positioning system but I am unable to make it work.
May I know what settings did you use?

Regards,
Joel