I have the following input file:

I am creating a pyramid TIFF for serving on an IIIF server. Under 8.9.2 it correctly converts. Under 8.10.0 it produces a black & white image.
Using file I get:

Correct Image (8.9.2):
TIFF image data, little-endian, direntries=17, height=1595, bps=8, compression=JPEG, PhotometricIntepretation=BlackIsZero, orientation=upper-left, width=1595

And the new version creates (8.10.0):
TIFF image data, little-endian, direntries=16, height=1595, bps=1, compression=none, PhotometricIntepretation=BlackIsZero, orientation=upper-left, width=1595

In both cases the command was:
vips im_vips2tiff infile outfile:jpeg:90,tile:256x256,pyramid

Why has the bps reduced and compression now missing?

All help appreciated!