It looks like the problem we had at the beginning of the year. Instead of being offered day 1 of October I was just offered day 31 and it said October for the daily rewards. Please deal with this in a timely manner unlike last time.
No need to rush after all. When I next opened the game it started me with Oct 1 rewards. So, definitely a bug because it shouldn’t have awarded the 31st of the month but apparently not a major one as it seems to be back on track. I’m fine keeping the extra 1600 runes since I’m still behind from the last time it messed up.