Does the user have a gpo that enables the setting? That's what it sounds like to me considering:
I haven’t been able to replicate the behavior on other PCs, but a number of X users replied to my post about this saying they have experienced the same thing in the past.
I'm also not clear if they are saying when they checked the setting was disabled, or if they're saying it was enabled and they don't recall setting it.
Of the 100s (possibly 1000s) of complaints I have about Windows, and Microsoft in general, some dude whose not sure how Edge imported settings is pretty far down on my list. Especially when the claim doesn't come with a before after screenshot, or the ability to reproduce it.