I notice that in the best editions of Origen's Contra Celsum that there are a lot of brackets around the text because there seems to be at least two variant editions. https://archive.org/details/contracelsu ... 8/mode/2up https://bkv.unifr.ch/de/works/cpg-1476/ ... tra-celsum
Libri antea editi, τί φησι καί. Sed cum istud, φησι, absit a MS. Regio, et redundet, expungendum duximus, ΒΕ.
More investigation is required. But interesting.