I'm going to my soapbox on this one.
We dealt with this exact issue after our C5300S was delivered in spring of '21.
What I found extremely frustrating was the dealer's first suggestion, "it may be the paper, try a better quality sheet".
We ran over 2mm impressions of the exact same digital matte 100# text through our Canon machines for years without sheet to sheet fusing issues.
Awfully considerate that they suggest we buy $85m sheets instead of $65m sheets to make a machine they repped as an equal to the Canons function properly.
The third suggestion, on a brand new machine was, "buy a small fan and run in at the output trays".
We do that. Daily. Grudgingly. Using the upper tray only.
My analogy is you buy a new car and the sunroof leaks, and the car dealer's remedy is to tell me to tape a tarp to the roof when it's raining.