So I am a brewer in best of one standard on my android, I play a random encounter gruul deck right now. I wasn't sure what happened the first time I came across this problem but it just happened again. I run surveil lands to manipulate my top deck for random encounter. I got to my turn, I drop my surveil land, overlord of the hauntwoods on top so I keep it there. I then cast my random encounter and among the 4 cards milled the overlord wasn't there. I always suspected that this was how card draw works in arena (I honestly think it doesn't work very well, the RNG is not good) but this is a massive design flaw. I just lost my second game in ranked because of this bug. I also am one to run more land ramp than the meta typically calls for, and I've noticed that even when I pull almost all of the lands out of my deck(which should give me almost guaranteed non-land draws) the top-deck rng is still just as likely to feed me a land off the top. Feel free to contact me to pick my brain about this, I play alot of arena both constructed and limited and would love to contribute to making the draw rng make more sense.