I have found the menstrual cycle feature very useful and so far it has been accurate to within 1 day every cycle. However, for some reason, it has recently set my cycle length to 12 days, despite my average over the last 6 cycles being 27 days. Thus, it is currently predicting a period every other week, which is obviously wrong and not helpful.
I have looked in the settings and confirmed that the cycle length there is set to 27 days and the cycle type to regular - I can only assume this is a bug of some kind. Please fix, I like this feature!
Whatever the issue is, I am seeing the same incorrect data in the Android app and Connect Web.