I wish not every Prolog discussion had a top comment about Mercury, Curry, Minikanren, et al; but I think you missed the end of my comment where I recommended SWI over Scryer for most people; I am unashamedly a Markus Triska fanperson but that doesn't mean I do everything he does, or that I subscribe to ISO Purity over all else. It was more that the parent comment claimed a "friction between two people" and I think that's unfair and leaves readers expecting soap opera drama where someone insulted someone's mother; whereas it is a difference of opinion about language compatibility and standards - and once you know that you can decide whether it matters to you and your potential use cases (which, again, it doesn't to me and I think it doesn't to anyone who hasn't touched Prolog before).

I am not aware of any practical applications which have broken, but then I'm not aware of anyone using Prolog for anything, anywhere.