Shimano R8020 - Leak

Had an issue with my Ultegra hydraulic breaks when installing new break pads. Tried to push the pistons back to make room for the new pads, and pressure must have been too high and fluid came out from the chamber on top of the lever. Re-bleed the breaks, and they currently work but bubbles are coming out by one of the bolts. Anyone experienced the same? Possible to stop the leak without replacing the lever?