detMap.findPoint(fid, wavelength) returns a valid point even if wavelength is not on chip

If I set x, y = detMap.findPoint(fid, lambda) for a wavelength lambda which isn't on the device the returned point lies on the edge of the device (e.g. y = 0).

This is a problem, as detMap.bbox.contains(PointI(x, y)) returns True. Please return an invalid point (e.g. one pixel above or below the CCD, or +- Inf)