“Christ Among Us”, an adult ed text, by Anthony Wilhelm, had its imprimatur removed in 1984, after lots of protests by the laity. It is possible later editions were granted an imprimatur, after revisions.
In this case, actual heresy was being taught.
Much more common were religion texts, such as those printed by Benzinger, Sadlier, Silver Burdette, and other publishers, primarily for children. They tended to omit anything about supernatural content, such as good or bad Angels, or the bread and wine becoming the Body and Blood, and focused only on “social content”. What they say was not so much wrong, but grossly incomplete.
Yes, Baptism does involve a person becoming part of the Christian community, but isn’t there something else? True, the Mass does bring the community together, but isn’t there something else happening, that God is doing, besides making people more concerned about the poor? Yes, priests do social work at times, but isn’t there something else in Holy Orders? The bad texts taught Peace and Justice, as defined by the secular media, rather than Catholic Social Teaching.
The bad religion texts had page after page of asking students “how do you feel about this?”, with no mention that some things are inherently True or False, Right or Wrong, regardless of our opinion. They encouraged Relativism, facilitated students obeying the secular culture, rather than critical thinking, or objectively looking at the secular culture.
When the Catechism came out in the 1990s, Religion texts in the USA were required to in some way adhere to that. Some genuinely did. Others would include what the CCC had about a topic, but in a footnote, or an appendix, which most classes would never cover.