Import dump failed. Oracle 12.2

Hi

We have a problem with import dump

Every time import is interrupted with such a log

ORA-39014: One or more workers have prematurely exited.

ORA-39029: worker 1 with process name "DW00" prematurely terminated

ORA-31671: Worker process DW00 had an unhandled exception.

ORA-29913: error in executing ODCIEXTTABLEFETCH callout

ORA-00600: internal error code, arguments: [klxpr_22], [2], [8], [6633], [0], [1

2], [], [], [], [], [], []

ORA-06512: at "SYS.DBMS_SQL", line 1721

ORA-06512: at "SYS.KUPD$DATA", line 1147

ORA-06512: at "SYS.KUPD$DATA", line 1239

ORA-06512: at "SYS.KUPD$DATA", line 3389

ORA-06512: at "SYS.KUPD$DATA", line 4684

ORA-06512: at "SYS.KUPD$DATA", line 6317

ORA-06512: at "SYS.KUPW$WORKER", line 21983

ORA-06512: at "SYS.KUPW$WORKER", line 5541