I am using a reading plan while leaving L4 running and the text (TNIV) open for days. After two or three days, the reading plan starts to fall behind. The reading plan filter would not update to show "today's" reading correctly. Rather, it keeps staying on yesterday's reading which is already marked as read. Even switching to the home page and clicking on today's reading doesn't resolve the issue. Only disabling and (re) enabling the filter does the job.
This is with 4.2, all updates applied.