Crash when exporting regions

[keflavich]

Describe the bug
When exporting regions, the CARTA server crashed with the following error:

2022-10-15 20:36:21     INFO    ImageFitsConverter::ImageHeaderToFITS   Truncating miscinfo field useweightimage to useweigh
2022-10-15 20:36:22     INFO    ImageFitsConverter::ImageHeaderToFITS   Truncating miscinfo field useweightimage to useweigh
[2022-10-15 20:36:23.547] [CARTA] [error] Spectral requirements failed: no region with id 42
[2022-10-15 20:36:34.032] [CARTA] [error] Error converting point to file 2: LCBox::LCBox - blc [1012, 3613, 0, 0] must be <= trc [1012, 1999, 0, 511]
[2022-10-15 20:36:36.277] [CARTA] [critical] Invalid size given to N8casacore6VectorIfSaIfEEE: should have dimensionality of 1 -- ndim 1 differs from 4

To Reproduce

1. Create regions
2. Switch to a different image with matched coordinates that is not at the same location
3. make more regions
4. Export

Notably, the export was fine when I was exporting in the first frame, but not in the second

[kswang1029]

Might be the same root cause as #1205