Two small-ish but ongoing issues affecting our saved BAEC profiles:

1.) My partner's mobile phone number is repeatedly removed and her profile marked down to "86% complete". Mine is fine.

2.) Our home address (in Germany) is automatically 'enhanced' by the addition of a line that names the part of town we live in. This is then used when BA writes to us, e.g. on the envelope containing my new BAEC card. The addition presumably comes from a database BA uses to check/complete addresses. It is correct in the sense that our part of town has been correctly identified, but wrong in that the words added are not part of our official mailing address. If we correct the error it gets overwritten.