@John-M I haven’t fully tested the whole story that you paint but I ran a test and was convinced that nothing was right until I discovered …
- Set up a new directory of 4 images, no DOPS with a ‘Preferences’ of

Which was wrong because I wanted to use ‘5 - …’ for RAW!!
- Set ‘Constrain to image’ to “OFF” for the first two images and left the other two alone and was convinced that
DistortionAnamorphosisKeepEntireImage= False was set for all 4 images which it was

but I missed the Overrides = addition to the end of the DOP for the first two images

Now I will test with ‘5 - …’!