This 2 years old video may give a clue. What might be wrong with the recent Coldcard hack! https://youtu.be/oj_W3xOlt6U

I think the problem with this hack is how cold card is being marketed towards newbie, when clearly it's for advanced users created this whole mess. I use seedsigner, but never will recommend this to the people who are not tech shavy. All influencers recommended Coldcard as a gold standard for cold storage, turn out to be false. Clearly missed The Red flag visible years ago mainly because it's Bitcoin only.