"Nous avons rendus les sandwichs."

[pfeil]

In this case, shouldn't it be "rendu"?

[Sitesurf]

Absolutely, big mistake, since the object is placed after the verb.

[Koolkaren]

For sure! I'll report it, too. It's kind of discouraging that such a blatant error is still there a month later!

[pfeil]

Thank you. I sent a feedback to Duolingo.