$filter using tolower() and 'and' not working as expected

[nkim-radley]

Odata toLower is not implemented.

Does not work:
...?$filter=(contains(tolower(FieldA),'a))

Works:
...?$filter=(contains(tolower(FieldA),'A'))

And $filter using and aren't returning correct records for the following:

...?$filter=(contains(tolower(FieldA),'A')) and ((FieldB eq 'B') and (FieldC eq 'C'))

Which I would expect should return a record with values like the following:

{
            "FieldA": "A",
            "FieldB ": "B",
            "FieldC ": "C",
}

I get the above record when I separate the filter in the following ways:

...?$filter=(contains(tolower(FieldA),'A'))

...?$filter=((FieldB eq 'B') and (FieldC eq 'C'))

But when I run the $filter separating the two with an and, I get no records back.