the files are auto named by Stable Diffusion according to their prompts - you invested a lot of mind reading into your lengthy answer.
mind reading isn't a basis on which tackling tech-issues seems a worthwhile endeavor.
v2 can't deal with >256 chars filenames. full stop. I said from the get go that a discussion about how and why and why not the filenames are lengthy is not leading towards a technical solution. yes, filenames can be altered, they can be lengthened, shortened, renamed, recomposed, translated, turned into a rhyme, turned into numerics, uppercases, lowercases. why are we having this discussion, I already said it's stupid.
v2 needs a fix to handle these filenames, since much inferior "windows" applications do not seem to have an issue with them, there's no argument to be made why the awesome Affinity v2 Suite should be the incapable standout.