3.5 and 3.6 are now only accepting security fixes.

Only the stability of random.random is guaranteed across versions, but you are calling randrange:

https://docs.python.org/3/library/random.html#notes-on-reproducibility

So I am pretty sure that this will not be considered a bug (unless it is a design bug).

Personally I think that the lack of reproducibility of the full range of random methods is a rather large annoyance: if you care about reproducibility, including doctests, you cannot use anything in the module except random.random, but have to write your own implementation (possibly by copying and pasting).

I don't have a good solution for this though.