Not that I have ever experienced anything of the sort with any ISM so perhaps it's a personality issue , but then I don't expect a crew meal whilst the CC are doing a passenger service .They work very hard during the service. There again there are some crews that are much better than others .
a Simple solution to the ISM problem should you encounter it , is to turn it back on them
" Look I understand that you are all busy, but every good ISM that I have ever flown with with has always been able to manage the flight deck as well as the passengers even if it means the ISM having to make a cup of tea or bring in a meal "