DLM does (most of the time) sort itself out, there's not a hard requirement to get it manually reset. The exception would be if it's kicked in due to a fault and in those cases a manual reset might be required.
I had my sync drop to bang-on 60Mbps a few months back for a few weeks, eventually it became unstuck when the SNR targets dropped to 3dB.
I had my sync drop to bang-on 60Mbps a few months back for a few weeks, eventually it became unstuck when the SNR targets dropped to 3dB.