I have a bike with a left ST-R8020 hydraulic disc Ultegra lever, and I just noticed a large radial crack on a what seems to be part of the brake connection path (see picture). The crack seems to result from overtightening the screw at its center. At first I though this was a structural part, securing the lever to the handlebar, but it seems to be a cylinder, inside which the brake hose interfaces with the lever. The brake hose entrance is just before where the torque settings are printed. No brake fluid has leaked out.
What may be the consequences of this crack? Will the brake connection likely leak in a near future as a result of this crack, or the lever fail in some other way? I have no experience with the lever internals or hydraulic brakes to be able to judge this situation.