A question was asked called "what is hyper-parallel entanglement and hyper-parallel quantum computing". I spent time doing the research to find out what they were, and wrote a very detailed answer including screenshots from multiple papers and it genuinely took me a long time, but now the question (and my answer) seems to be gone.
Considering the behavior of this user against me in the past, I find this to be quite vexatious and in fact harassment. Sure we can assume good faith and say that people have the right to delete questions when they decide it wasn't a good decision to ask that question, but in this case it seems like bad-faith. It seems the user wanted to purposely vex me by deleting an answer I put effort, time and energy into, or when he realized how easy the answer was: he deleted it because he was embarrassed, neither of these are acceptable reasons to delete someone's work.
There is a violation of the CoC here and I wonder what can be done, starting with how to get the question and my answer back?