Sandro Tosi wrote: > I don't know how affordable that is: we're only able to replicate it > on production env (not exactly the best place to run tests) and after > at least 7/10 days of live traffic In that case, a good first step would be to try to replicate it in a more artificial setting, I guess. Then you'd be able to bisect or get help from upstream. Sorry I don't have any better ideas. Thanks, Jonathan