Siril saves fits file incorrectly (turns it around 180 degrees)

I’ve been using Siril now for over a year (and have donated) and noticed only recently that when processing IC434 (horsehead), the fits file has turned around 180 degrees. This was easy to spot, naturally. Is there a setting to stop this or is it a bug?

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Hello.

Please have a look here:
https://siril.readthedocs.io/en/stable/file-formats/FITS.html#orientation-of-fits-images