I personally think it's clear that they continue to work - but VERY slowly, and some offices less so than others. Not suprising, it means they are not shut down, but seriously delayed. In other words, they'll get to it when they get to it.
A related note: while IRCC leads on immigration files, there are other departments involved: public security (CBSA, rcmp, etc) and outside agencies like the visa centres. They also have limitations on what their staff can do and resource limitations (notably many of the visa application centres are closed to public as they are private companies and must follow lockdown rules of the country of operation). And they will have to reallocate staff and adjust priorities, too. And foreign-partner agencies and governments sometimes, too. Police, security and border control all have - quite obviously - other mandates that are literally essential public order functions.
Slowdowns or stopped work in any of these organisations can and will cause delays that IRCC alone can't control.
Expect delays, even if work not 'stopped.'
