“I’ve not heard this in the Protestant circles I encounter. Anyone have an example? Thanks!”
I have - many, many times heard this from Protestants. I have even heard of more bizarre understandings such as a Moody Bible school prof who refused to teach anything other than Paul’s letters because ONLY IN THEM he said do you find the gospel. Apparently he did not think the gospel was in the Gospels. Now, that is truly bizarre!
The “New Perspective on Paul” implies that Protestant understanding of Paul was different than that of the Early Church Fathers too.
Some of the bizarre pseudo-Protestant views of history - a truly revisionist history - can come out with things that are not only heretical but border on the insane: http://toledofavs.com/2014/04/21/aramaic-jesus/
LOL ... So did Jesus preach what the authors of the “gospels “ told Him to?
After the apostles died, was the gospel hopelessly lost until the Reformation?
Your answer did not address the comment.
Show us where any Protestants taught that the gospel was hopelessly lost until the Reformation.
Building strawmen to know down doesn’t give you any credibility.