backend crash when using v4.1 appimage to generate a moment image

[kswang1029]

This is a user input via the Helpdesk. If we use the v4.1 appimage (tested on RH8 or Ubuntu22.04) to generate a moment image from a FITS cube (this one is with per-plane-beam), the backend will crash. However, with the v4.1 rpm, a moment image can be successfully generated. This implies it is a packaging issue.

please contact @kswang1029 to get a copy of the test image

[kswang1029]

UPDATE: I confirm that it is due to the image contains a per-plane-beam table. If we convolve the cube with a common beam size, then with the v4.1 AppImage, we can generate a moment image successfully.