Low Battery Email but battery is at 91%

I noticed that my battery has been low much more often than before. I got an email this am at 0640 that my battery was low and I thought it was odd so I checked on the app and it says that it is at 91%. Wondering why the notifications are off. Included photos.

Hey @meganinflorida. Did you recently charge your Doorbell? It’s possible the email may have hit your inbox very late (possible email delays on the email server end), and if your Doorbell was recently low, you just got the email late! If this continues to happen, please let me know.

Maybe three days ago. Not super recent at all.