ARG0000zut: blue zp 0.72 host!
This is pretty unusual (to me at least). The host seems to be 0.721±0.152 SDSS J075123.58+425653.8, which looks both blue and nowhere near compact (as you'd expect of a galaxy at this redshift):
Perhaps it's a chance overlap?
by ivywong scientist, admin
it looks a lot like a smudge in the blue filters so my 2 cents is to check for deeper images of this field and possibly NIR spectroscopy to know for sure.
The blue smudge is not the host:
The contour overlay image in this post was created from sources, and using methods, described in this RGZ Talk thread.