Incorrect TNS ADMIN environment variable in frmbld.sh after cloning EBS R12 environment.

Hi All,

Incorrect TNS ADMIN environment variable in frmbld.sh after cloning EBS R12 environment. We have R12 12.1.3 environment on Linux  Red Hat 6. After cloning the environment frmbld.sh has TNS_ADMIN incorrectly set.

source environment variable TNS_ADMIN is

TNS_ADMIN=${TNS_ADMIN:-$ORACLE_HOME/network/admin}
  export TNS_ADMIN

After cloning it is changed to below in destination environment.
TNS_ADMIN=$ORACLE_HOME/network/admin.
  export TNS_ADMIN

Is there a way to prevent this from happening?
Also refered note 431324.1.

Is it that every time we clone we need to apply the patch is there any permanent fix to this problem?