gpg2 encrypt-test failure for ppc64 BE

as reported in OBS 
https://build.opensuse.org/package/live_build_log/openSUSE:Factory:PowerPC/gpg2/standard/ppc64

===
grep FAIL _log
[   77s]     > IDEA 3DES CAST5 BLOWFISH FAIL: encrypt.test
[   77s]     > IDEA 3DES CAST5 BLOWFISH FAIL: encrypt-dsa.test
[   82s]     > IDEA 3DES CAST5 BLOWFISH FAIL: conventional.test
[   83s]     > IDEA 3DES CAST5 BLOWFISH FAIL: conventional-mdc.test
===

I am able to recreate the above failures in my ppc64 BE guest
and adding a trace in encript.test is reporting following error messages.
I do not know yet how to continue investigation from here.
===
abuild@twppc64:~/rpmbuild/BUILD/gnupg-2.1.5/tests/openpgp> tail
encrypt.test.log 
+ for ca in '`all_cipher_algos`'
+ echo_n 'BLOWFISH '
+ test yes = no
+ echo -n 'BLOWFISH '
+ for i in '$plain_files' '$data_files'
+ ../../g10/gpg2 --no-permission-warning --always-trust -e -o x --yes -r
two@example.com --cipher-algo BLOWFISH plain-1
gpg: WARNING: forcing symmetric cipher BLOWFISH (4) violates recipient
preferences
gpg: selftest for CFB failed - see syslog for details
gpg: Ohhhh jeeee: ... this is a bug (seskey.c:60:make_session_key)
./encrypt.test: line 24: 14770 Aborted                 $GPG ${opt_always} -e -o
x --yes -r "$usrname2" --cipher-algo $ca $i
===
$journalctl |grep 14770
juin 24 11:32:35 twppc64 gpg2[14770]: <audit-1701> auid=1000 uid=399 gid=399
ses=4 pid=14770 comm="gpg2"
exe="/home/abuild/rpmbuild/BUILD/gnupg-2.1.5/g10/gpg2" sig=6
===