[PostGIS] #5835: The variants of ST_Union gives results that are inconsistent with each other

[PostGIS]

#5835: The variants of ST_Union gives results that are inconsistent with each
other
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  Reporter:  nbvfgh   |      Owner:  pramsey
      Type:  defect   |     Status:  new
  Priority:  high     |  Milestone:  PostGIS 3.6.0
 Component:  postgis  |    Version:  3.5.x
Resolution:           |   Keywords:
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Comment (by mdavis):

 Reported in GEOS here: https://github.com/libgeos/geos/issues/1224

 Partially fixed by GEOS PR: https://github.com/libgeos/geos/pull/1229
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5835#comment:4>
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