Issue with 'Multiple Selection' Functionality in BIP report Parameter

We are using BI Publisher 11.1.1.7.160719

I have enabled multiple selection in report parameter in BI Publisher.

The multiple selection works properly if user selects 1 or 2 values or 'ALL' in parameter . But when user selects values more than 2 from LOVs then the report results for only one of the selected values (arbitrarily selects one out of the multiple selected values).

For example if user selects parameter value OU= 'A' THEN report results for OU='A'

if selects OU = 'A' , 'B' THEN report results for OU= 'A' and 'B'

if selects OU = 'A', 'B', 'C' THEN report results for either OU= 'A' or 'B' or 'C' (any random one only out of A,B,C)