Yeah, it's a reasonable expectation since the blog highlights it. Just figure it's worth calling out that SOTA trackers are able to deal with object disappearance well enough that when used with this it would handle things. I'd venture to say that most people doing any kind of tracking aren't relying on their segmentation process.
I’m not sure what you are looking for a reference to exactly, but segmentation as a preprocessing step for tracking has been one of, if not the primary, most typical workflow for decades.
