OData - update of clob value using HTTP method PATCH does not set correct value of the column

<?xml version='1.0' encoding='UTF-8'?>
<entry xmlns="http://www.w3.org/2005/Atom" xmlns:xml="http://www.w3.org/XML/1998/namespace"
    xmlns:m="http://docs.oasis-open.org/odata/ns/metadata" xmlns:d="http://docs.oasis-open.org/odata/ns/data"
    xmlns:gml="http://www.opengis.net/gml" xmlns:georss="http://www.georss.org/georss">
    <category scheme="http://docs.oasis-open.org/odata/ns/scheme" />
    <content type="application/xml">
        <m:properties>
            <d:intnum m:type="Int32">4</d:intnum>
            <d:stringval>4</d:stringval>
            <d:timestampval m:type="DateTimeOffset">2004-01-01T00:00:04Z</d:timestampval>
            <d:clobval m:type="Binary">Y2xvYl92YWx1ZV8wMDAwNA==</d:clobval>
        </m:properties>
    </content>
</entry>

<d:clobval m:type="Binary">NjM2YzZmNjI1Zjc2NjE2Yzc1NjU1ZjMwMzAzMDMwMzU=</d:clobval>