No. It's simply the lack of resources to process the oath-ready applicants in a timely manner. Maybe they need to update certain forms and the citizenship certificate text to reflect the updated citizenship oath, but there's really a huge backlog.Could the recent delays on oath ceremonies be due to the change in the oath declaration ?
https://www.canada.ca/en/immigration-refugees-citizenship/news/2021/06/canadas-oath-of-citizenship-now-recognizes-first-nations-inuit-and-metis-rights.html