Still trying to fix the problem that fixing issue #1353 uncovered

Author: David Turner

xga/sources/base.py

@@ -1,5 +1,5 @@
 #  This code is a part of X-ray: Generate and Analyse (XGA), a module designed for the XMM Cluster Survey (XCS).
-#  Last modified by David J Turner (turne540@msu.edu) 06/06/2025, 11:21. Copyright (c) The Contributors
+#  Last modified by David J Turner (turne540@msu.edu) 06/06/2025, 11:29. Copyright (c) The Contributors
 
 import os
 import pickle
@@ -1530,7 +1530,7 @@ def dist_from_source(reg):
             # If either of these are fulfilled then we MUST have a WCS - even though custom regions are always
             #  in RA-DEC, the regions module requires a passed wcs to be able to use 'contains' - will have to
             #  change all this at some point
-            if ds9_regs[0] is not None and len(custom_regs) != 0:
+            if ds9_regs[0] is not None or len(custom_regs) != 0:
                 # Grab all images for the ObsID, instruments across an ObsID have the same WCS (other than in cases
                 #  where they were generated with different resolutions).
                 #  TODO see issue #908, figure out how to support different resolutions of image