Hello,

There was a ticket #279 which should fix the problem but I was done incorrectly and it still doesn't work.

There is a class QueryParamEncodedPair which return encoded value

public String getValue() {
    return UriUtils.encodeQueryParam(this.origin.getValue(), StandardCharsets.UTF_8);
}

Then this class is used when uri is build by uri builder:
class FpEndpoint -> method get:

URIBuilder builder = new URIBuilder(this.endpoint + path);
builder.setParameters(new ListOf(parameters));
HttpUriRequest get = new HttpGet(builder.build());

And this builder.build encode parameters again. So instead of using QueryParamEncodedPair there should be BasicNameValuePair class passed to this method.
Can you change it?

Best regards,
Przemek