A very unusual result if the 'bridged tap' is genuinely clear of your premises ??
The only other likely places to have a 'bridged tap' fault, are ...... on IDC connectors in the cabinet, in the Cabinet box (where all the UG cables meet)
if a Cab changeover has been performed and the temporary 'tee joint' still left in place, or at the DP (if it is an overhead feed).
That info is 'in general terms' and not just your case in isolation, mpmc .....