The most troubling thing for Manchester United is the similarity in the mistakes being made.
Andre Onana allowed Leroy Sane's fairly powerless shot to squirm past him and it might well have been David de Gea against Brentford or West Ham last season.
United spent £47million on Onana at Erik ten Hag's behest because they felt De Gea was making too many high-profile errors, which were outweighing his shot stopping abilities.
Onana was also signed because his passing attributes are far superior to those of De Gea but nobody is talking about that right now.