I am curious if this is a bug, or a setting issue. The odd thing, if it is a setting, is it works for most shapes in the diagram, then suddenly refused to work for others. The only two things that I can identify that might be responsible for breaking the alignment of the connectors is copy and paste and zooming in/out. The diagram below explains the issue. The two on the left would not align properly to the central or external geometric positions.
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