Unexpected behavior of querieng MapAnnotations

[atarkowska]

When loading IObject, like Annotation I would expect that all fields mapping objects are are unloaded (maybe except details).

I was interested why MapAnnotation?.mapValue which is basically NamedValue? is different

m = query.find('MapAnnotation', 773072)
print type(m), m.mapValue <- loaded

or

sql = """
    select a
    from MapAnnotation a 
    where a.ns = :ns and a.details.owner.id = :id
"""
p = omero.sys.ParametersI()
p.addId(expId)
for ma in query.findAllByQuery(sql, p):
    print type(ma), ma.mapValue  <- loaded

More as I would expect to join NamedValues? as other objects then ​https://gist.github.com/aleksandra-tarkowska/ace091135c97ce0027eb9e0211d58ad4 cause duplicates.