no region stat for matched images generated with CASA ia.fft

[kswang1029]

Reported by a user

To reproduce the issue:

1. load the attached images and match them
2. make a region on the first image
3. set the first image as active and pan around the region to see region statistics. This is working well.
4. set the 2nd image (matched) as active and pan around the region to see region statistics. This triggers the issue.

The backend log says:
[2021-12-07 15:07:19.375] [debug] Region conversion failed or was distorted, using polygon approximation for rectangle
[2021-12-07 15:07:19.375] [error] Error converting region to output image: (/Users/kswang/carta_build/carta-casacore/casa6/casatools/casacore/coordinates/Coordinates/CoordinateSystem.cc : 1143) Failed AlwaysAssert world.nelements() == nWorldAxes()
[2021-12-07 15:07:19.375] [error] Error approximating rectangle as polygon in matched image.

With other images generated with CASA tclean, there is no such issue.

tmp.zip