OV9281 config file question

[MaximeRiouEPFL]

Setup

• OV9281 camera
• UC-593 Rev. C camera shield
• Ubuntu 20 x86
• config file: https://github.com/ArduCAM/ArduCAM_USB_Camera_Shield/blob/bf2984cffb37cda9b57e4f7cfc377a502f6137e4/Config/USB3.0_UC-593%20Rev.C/MIPI/OV9281/Channel_A/1Lane/OV9281_MIPI_1Lane_RAW10_10b_1280x800_40fps.cfg

How to reproduce
Using the python demo script and adding the following line to make the camera display a test pattern

ArducamSDK.Py_ArduCam_writeSensorReg(handle, 0x5E00, 0b10000010)

after

ArduCAM_USB_Camera_Shield/Linux_x86/Python/Streaming_demo/ArduCam_Py_Demo.py

Line 202 in bf2984c

ArducamSDK.Py_ArduCam_setMode(handle,ArducamSDK.CONTINUOUS_MODE)

The output image is the following RGB image. Given that the OV9281 camera is monochrome I find this odd.

Question
In the ov9281 config file, under [camera parameter], I found:

ArduCAM_USB_Camera_Shield/Config/USB3.0_UC-593 Rev.C/MIPI/OV9281/Channel_A/1Lane/OV9281_MIPI_1Lane_RAW10_10b_1280x800_40fps.cfg

Line 67 in bf2984c

FORMAT = 0, 0

Which would stand for RAW/RGB. Given the OV9281 is a monochrome camera, why is it configured like this? Shouldn't it be FORMAT=4 (Mono)?
In my understanding, if the correct setting is monochrome and the camera is set to raw/RGB, why is there no segmentation fault or a similar error given that it is trying to read 3 times more data?

Why do the images not appear RGB when running normally?

Other question
Every time I start recording, there is the following error

Error capture image, rtn_val =  65317

Which stands for ArducamSDK.USB_CAMERA_FRAME_INDEX_ERROR = 0xFF25
And then everything works fine:

fps: 44 /s

Is there a way to not get this error at the start?