I suppose the risk is people could 'game' the system.
Person A finds the issue, reports it.
Then Person A secretly tells Person B about it (with no apparent connection), and Person B reports the same issues a few weeks later, but with apparent different code/description to look ever so slightly different.
Person A finds the issue, reports it.
Then Person A secretly tells Person B about it (with no apparent connection), and Person B reports the same issues a few weeks later, but with apparent different code/description to look ever so slightly different.