Sometimes Auto mod in taiko won't get the maximum score, here are the occassions:
1. When there are 2 sliders in a row (time distance between them isn't important), Auto mod will miss first tick on second slider. Similarly, if there are N sliders in a row, first tick will be missed on each slider except the first. Example map: http://osu.ppy.sh/p/beatmap?b=61024&m=1 (after combo 10, there are 5 sliders in a row, so it is easy to notice)
2. In some occassions, when spinner is long enough in HR and/or HT mode, Auto mod won't complete it, example: http://osu.ppy.sh/p/beatmap?b=8734&m=1, slider at around 72 combo (with HR + HT mod) (fixed)
1. When there are 2 sliders in a row (time distance between them isn't important), Auto mod will miss first tick on second slider. Similarly, if there are N sliders in a row, first tick will be missed on each slider except the first. Example map: http://osu.ppy.sh/p/beatmap?b=61024&m=1 (after combo 10, there are 5 sliders in a row, so it is easy to notice)