Title is pretty self-explanatory. Email addresses shouldn’t be autocapitalized, nor autocorrected. In many cases this is frustrating, and in common cases this can lead to inadvertent wrong identity data stored. For example if I don’t notice it autocorrects “eir” to “Eric” per the attached screenshot, I now have a User record with incorrect identity.
Let me report it to appropriate team and see what they have to share on that front!