Getting ora-01031 but delete priv is granted

SuSE 11 x86-64 Oracle 12.1.0.2

My user is trying to delete from a table but getting an ORA-01031: insufficient privileges, but behold: I granted delete to role lr2k_dml:

select grantor, grantee, table_name, privilege from dba_tab_privs where grantee='LR2K_DML' and table_name = 'DECODE' and GRANTOR = 'LR2K_STG';

LR2K_STG	LR2K_DML	DECODE	DELETE
LR2K_STG	LR2K_DML	DECODE	INSERT
LR2K_STG	LR2K_DML	DECODE	SELECT
LR2K_STG	LR2K_DML	DECODE	UPDATE

and granted the role to the account he's logged in as:

select grantee, granted_role from dba_tab_privs where grantee='LR2K_DML' and table_name = 'DECODE' and GRANTOR = 'LR2K_STG';