No, this is not a bug actually.

According to the ID3v2 specification, newlines should only be represented by an LF (0xA). Any program that has added CR-LF:s to your tags is erroneous, and it should hence be reported as a bug to them. Mp3/Tag Studio follows the ID3v2 standard exactly.
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------------- Author of Mp3/Tag Studio http://www.magnusbrading.com/mp3ts