I don't know if "normal" is the right word, but they are probably not unexpected and more par for the course for clients with abandonment and attachment problems.

Honestly, I had never heard of the word "rupture" in relation to therapy until I started reading posts here on PC, and I don't think I was particularly prone to them because those were not my particular issues. (I had all sorts of other issues but not those in particular).

I think for those of us who go to therapy for issues other than abandonment/attachment, when we run into a disagreement with a therapist (or anyone in our life to be honest), we just address it in the moment and move one. We don't tend to dwell over those disagreements or fear that they are a precursor to abandonment or an indication of judgment. They are just points for discussion that we handle in the moment and that's just the end of it without lingering problems.

So it isn't like we don't have disagreements, but they don't linger or rise to a level that we would ever think of as a "rupture."