if your snr margins are bonded, and the fault has been fixed, will dlm eventually let it unbond it self?, if so how many weeks?
Its banded rather than bonded, and yes, DLM will eventually relent but it could take a few weeks. Its not possible to say an exact timescale.
Its actually the speed that is restricted (banded) rather than the SNRm, the higher SNRm is an effect rather than cause.
This may help you
https://community.plus.net/t5/Library/FTTC-DLM-What-it-is-How-it-works/ba-p/1322799