Do you think my camera is malfunctioning ?

Original picture without background extraction 

What colour are northern lights?

There is almost nothing in the image and the auto-stretch is pretty aggressiv and blows it up …
Tell us more about your setup, telescope, offset setting on the camera …
Btw: I don not recognize the object … what is it?

NGC1333, me thinks:
https://www.astrobin.com/full/p4ii6t/B/

What about the image calibration pipeline, as I reckon the issue is there.

Object was initially setup at NGC 1333 but the asiair plus logged it as LDN 1452 for some unknown reason -it has been acting up on me after downloading latest firmware

Tom H:
Andrea calibration pipeline in Siril?

Yes, what is the calibration procedure in Siril. Do you remove master dark, apply master flat? And what about those as well. How do you create those? As an aside, do you use the L-eNhance for capturing NGC1333? That won't do and explains the loss of signal.

If that are your calibration settings I don't think you are calibrating anything, see below:

You need to enable the options (and do it the right way) in order for Siril to actually do something.

Are you using a script by any chance (like OSC_Preprocessing)?

Nope..

The issue is that your frames are not lined up correctly, so when they were stacked, the usable area (area of intersection of all the subframes) is actually quite small, and all the dark area in the upper right and bottom left are areas of little to no subframe intersection, thus, little to no signal there, vs. the very center of the image where there plenty of signal.

This level of misalignment in your subframes indicates to me that either: 1. Your dither settings are FAR too agressive, causing the images to walk away from the center of the desired target. 2. Your polar alignment is quite poor, and during the night, any pauses is guiding to achieve autofocus runs are allowing the scope to drift a considerable amount between, thus, walking away from the desired target center. 3. You're not carefully re-positioning the target if you're shooting multi-night images, again, causing the frames to not overlap correctly, resulting in this sort of image..

Remember, the image sensor in your 533 is square 3008x3008px sensor, and the resulting image you got is rectangle, and im willing to bet its greater than 3008px on both sides… That's a perfect indication that the resulting image is made from frames that are grossly misaligned.

I appreciate the help -my asiair plus is struggling with the meridian flip -has trouble centering after 
Going to try another night of imaging

Tom H:

asi air plus single image -jpeg

Andrea calibration pipeline in Siril?

Your OAG is partly obstructing your FOV. The top left dark patch is caused by the prism which is a bit too far in. You should rotate the OAG so that the prism side is parallel to a side of the frame. Then the obstruction can be reduced to a minimum or even avoided.