[Koha] Koha 18.05.00.000: Search in Group of Libraries not working after upgrade

Dear All After upgrading to 18.05.00 from 17.11, searching catalog by limiting to a group of libraries (OPAC and Staff Client) is not working. I have come to know that Library Groups have been re-designed as hierarchy of libraries ( *Bug 15707* <https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=15707> ) and I tried to redefine all my groups/sub-groups but still no luck. Note: Searching in any single library or All Libraries is working fine both in OPAC and Staff Client Thanks in anticipation for any suggestion/advice, please Regards, Ata