on mobile there a lot blank space, idk for what, maybe keyboard padding?
i know this auto scroll work pretty great in multiple choice on mobile, but in typing/writing question its not consistent at all, sometimes the scroll too high or too low, on back to back typing review this behaviour is so annoying.
Thanks for the report. The majority (probably - this is a hunch, not something I have data on) of renshuu users use gboard (as a majority of our users are on android, and that's stock for most), so I suspect that this is not just a "renshuu doesn't work well", otherwise I would be hearing about this A LOT. To the best of my knowledge, this is the first time I've ever seen this.
This isn't a fix, exactly, but do you mind seeing if this at least feels better? Pop open the top-left menu > settings > mobile. uncheck the "adjust quizzing for easier reach", and give that a spin.