iCloud website randomly pasting in my Apple ID

[octothorpe8]

[EDIT: this turns out to be a bug in the LastPass browser extension]

This is a really weird one.

When I log into iCloud.com on my work computer (Safari), I'm seeing my own Apple ID email address randomly appearing throughout the interface.

- in Calendars, ONE of my calendars is supposed to be called "work events" but keeps showing renamed with the email address I use for my Apple ID. No matter how many times I change it, it changes back. It's showing up correctly on both my home Macs and my iPhone.

- in iCloud Mail, as soon as I load it, it's sometimes coming up with my Apple ID pre-filled in the search field, as if it has been pasted there. Same thing in a lot of the other apps.

A couple screenshots showing how these apps look as soon as I load them:

 

[octothorpe8]

Whoa, I think I figured it out. I'm using the LastPass browser extension, which will autofill login details and other forms. It usually gives you a visual indication of forms it's autofilling — but on iCloud it seems to just be running amok, filling my address into various places. Not cool.