Invalid behiavour in MessageFormat for null values

Deleted Component: formatting

There is problem with message format:

with code:

I will get results

i.e. icu format handles differently null values, in my opinion in wrong way ... in javadoc for icu.MessageFormat is sentence:
An argument is unavailable if arguments is null or has fewer than argumentIndex+1 elements.
But in this case argument is aviable, only its value is null ...