If you used hide glue with your sinew wrap and you used a too much glue it could be the glue making the noise. If that is the case, it shouldn't hurt anything.
How long is the crack(check?) ? In my experience, super glue without a wrap is sufficient if the check isn't too long or wide. Will you post a picture of the crack and/or repair? Might make it easier to make a suggestion for the repair. Pat