Iīd like to add my 2 cents here.

During the beginning of my actual relationship (which is my first S/M relationship), this happened quite a few times. I would not blame my Dom for it. It did not happen immediately after a scene, either - it surfaced slowly during the next couple of days, and the more I had enjoyed the scene, the more intense the inner fight was later on.

The main reasons/causes were, as I would see it now:
1. I was not aware that I liked certain things. Even more, the idea that I could like certain things shocked and disgusted me.
The realisation that I not only liked some things that had happened, but that those in turn made me want to dive even further into submission, was also scary for me.
2. No man except him had ever before had such influence over me. I let go of my self-control, I let go of some principles, I allowed facets of myself to appear which I used to hide even from myself pretty much.

So, it could happen that I transformed my insecurities and fears into rage, which I then directed against him.
He, having had years of BDSM experience (and I donīt mean online...), understood all that - he even pointed it out to me later, when I had calmed down again.
We have been together for more than 10 years now, and I learned my own feelings/desires better now, though there still are surprises. But if those surface now, I try and talk about them much sooner - without letting my feelings scare me so much, and without directing anger at him.

This is the only "subdrop" experience I had, and I would say this is prone to happen at the beginning of a new BDSM relationship - which is one of the reasons why I so strongly recommend that one new to the lifestyle should take his first steps with someone experienced, if at all possible.

I am sure there are other subdrop varieties, maybe caused by a scene gone wrong etc., but I haventīhad those, so I cannot contribute anything helpful, except that it is important to communicate after such an experience; but I trust most people are already aware of this.

Kind regards
Arria