I hope someone knows how to avoid this issue, it's just annoying and I hope IBM will do something about this one day:)
Copying code from TI editor or Rules Editor ( Control+C ) to clipboard has this issue ( I always had this issue since version 9.4 at least ). The issue is that instead of storing the code you want to copy in clipboard, it stores the following lines

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TM1
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Process completed successfully
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OK
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