OOM kicks in easily if AD is activated, but it still better than it was at the time Qt version was upgraded. If AD takes about half of RAM, it shouldn't be a surprise that there are OOM issues. My device has begun to suffer from complete freezing of UI at times when under heavy use, also audio stuttering is quite bad at times (for example when playing tracks from Spotify though bluetooth after ending a call, or at time when using HERE for navigation).