Missing BBT info

I started tracking my bbt back in November of last year and now it only shows my info going back to first day of this year. The whole point of tracking bbt is to track it over a long period of time so you can see the trend. I think there is a bug in your latest update that makes it so that bbt info only shows from the first day of this year. I hope you can fix it because otherwise it makes the tracking if baby kind of pointless and it's already a pain in the ass to check every day.