OnAfterConfigRead event is executed several times for one prefix. This happens, because OnAfterConfigRead event is executed directly in several places in system and not in all cases they use unit config reader to check for duplicate event execution attempt.
Imported from wiki, originally reported by S.G.
Task: http://tracker.in-portal.org/view.php?id=500 (0000500: OnAfterConfigRead event is executed several times for one prefix).
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