It’s probably not a SmartRules issue if it’s in the last few days. There was a known scheduler problem that was only affecting accounts on the oldest database shard, so it sounds like you were in that group. 
They pushed out one platform fix that was supposed to fix it, but it didn’t fix it for everyone. And it may have broken something additional for some people.
It was listed in the first bug reports in the community created wiki a couple of days ago.
http://thingsthataresmart.wiki/index.php?title=Bug:_First_Reports#November_2016_3