If your application has started processing, it cannot be rejected, unless you do not meet the eligibility criteria. After the application processing starts, a decision has to be given. Now due to the circumstances it may take longer, but the application just cannot be refused, unless the Canadian Parliament passes a law a they did in 2012, which was due to excessive delays. Even in 2012, only application for which processing has not commenced were scrapped and refunds issued, not for the ones processing had commenced.
As of now, we are no where close to 2012 situation and given that Canada is struggling to meet its immigration targets, scraping opening applications, that too that have been processes is not possible and next to impossible.