My recent encounter with Air Canada's cabin baggage policy left me utterly frustrated, and I feel compelled to share my experience. As a seasoned traveler, I've relied on my trusty carry-on for years without any issues. However, my interaction with Air Canada's gate staff shattered my confidence in their consistency and fairness. Upon reaching the gate entrance, I was asked to place my carry-on in a sizing box for inspection. Despite fitting within the parameters, I was told I needed to check it in because, apparently, I had "shoved it" to fit. This arbitrary decision baffled me, especially considering my past seamless experiences with the same bag on Air Canada flights. Seeking clarification, I requested to speak with a supervisor, only to receive the same unsatisfactory explanation. When I mentioned that I had used the same carry-on on another Air Canada flight just the week before without any issues, I was informed that different cabin sizes are utilized for night flights. This revelation left me dumbfounded, raising questions about the lack of transparency and consistency in Air Canada's policies. As a loyal customer, my frustration is compounded by the fact that I specifically chose to travel with a carry-on due to previous experiences with lost or late baggage during five-day trips. It's disheartening to encounter such obstacles when attempting to take proactive measures to safeguard my belongings. While I remain polite, my frustration with this experience is palpable. I urge Air Canada to address these inconsistencies and communicate pertinent information clearly to passengers to avoid similar frustrations in the future.…