Strange behaviour with email property on forms

[gtrinkwon]

When populating a form with a user model, the email field populates with the number 1.

This happens on EmailType and TextType

Creating a second field with any other name, and populating that field in the user model works fine, it's just the name 'email' that causes it to fail.

Adding

                'data' => $options['data']->email ?? null,

Seems to resolve the issue, but it's strange and a bit worrying that this issue occurs, and this step could easily be forgotten.