The light-welterweight, 25, was fined by police following an incident in the Surfers Paradise area early on Tuesday morning. His Games had ended on Sunday when he was defeated by England's Luke McCormack.
Northern Ireland Commonwealth Games Council (NICGC) managers said they had studied CCTV footage "that raises concerns as to the accuracy of the initial information" and had asked Queensland police to review their decision.
"The NICGC has reviewed the latest evidence and determined that team sanctions will not be taken against Sean in relation to this incident and we can confirm that he remains an integral member of the boxing squad and the wider team," said the statement.
"In our opinion he is an innocent victim in this matter and he retains the full support of the NICGC." The NICGC is seeking legal advice, it said.
"We are disappointed that the reputation of the athlete and the NICGC is being impugned and we want to ensure that every opportunity is available to resolve this matter," said the statement.
An 18-year-old woman was punched in the face and a glass thrown at a man of the same age, cutting his face, police said, adding that investigations are continuing.
"This is not the type of behaviour that we would expect from anybody associated with Team Scotland, past or present," a Team Scotland statement said.
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