The blow are all my opinions on things and may differ from those of others.
I have not been a fan of almost anything Marineland since they became a part of the pet division of a conglomerate. My vert first filters were and Emperor 400 and an UGF which became a RUGF powered by a reverse flow Marineland power head. I had to give up the RUGF and instead added an AC 200 (now called a 50). When the Emperor quit after 7 or 8 years I got a new one. 30 minutes after it went onto the tank it came off, was dried out, re-boxed and returned. There are a few brands in the hobby I tend to avoid.
One of the few Marineland products I have used for years was their H.O.T. Magnum filter, They discontinued it and then they changed the universal micron cartridges they made which had fit all the filters in the Magnum line. With the change, the micron no longer fit in the H.O.T.s unless one removed the two sealing gaskets placed on the top and bottom of the cartridge.
So they made as product which lasts for decades and then stopped making one of the key components to continue using it. I have gone from having several of these filters on tanks to removing all but one of them for something else. Ad the one tank (150 gal.) I still have one on it as the third filter after an Eheim Pro II canister and an AquaClear 110. I have never considerd owning any canister nit Eheim.
So, I would not be surprised if an air bubble problem in a canister might be something you need to research big time. I had never heard of the Magniflow 220, so I had to Google it. I went right to the Marineland page.
https://www.marineland.com/products/filtration-and-water-circulation/magniflow-canister-filter.aspx and there right on top was the rating for this product: 2.6 out of 5 possible stars (95 raters). And this was followed by " 34 out of 88 (39%) reviewers recommend this product" (I assume 7 raters did not answer the recommendation question?)
If you follow the above link, you can mouse over the star rating and get a pop-up that lets you see all 95 reviews. These may explain your issue. I only read a few.
Of course, all of the above are my personal opinions for whatever they may be worth. I am sure there are plenty of folks who would disagree.
The Aquatic product brands in the Spectrum Pet division include: Tetra, Marineland, GloFish, Instant Ocean and Omega One. The division has 15 other pet brands not related to Aquatics.
https://spectrumbrands.com/brands/pet-care.html