Why does Image Capture scan tiff files with different compression formats?
I am encountering this same problem. I realised this when I tried to import my scanned photos into Lightroom and got an error that "The file uses an unsupported compression algorithm".
From some online research and then trying it out myself, it appears that Image Capture for some reason switches compression when the cropping box is at a non-zero angle.
I hope there is a fix for this, but I haven't been able to find any, which is frustrating. I'm now researching other scanning programmes, though the UI of most are not as friendly as Image Capture.