Hello @Chris Follett​,
My name is Alejandra and I am happy to assist with your inquiry, and appreciate you contacting LastPass Support!
I apologize for the inconvenience this is causing you.To disable the LP icon from the fields just while doing your changes you can access to the extension settings > Notifications and there you will see the option to disable the autofill icon on fields. You cand find more here: https://support.lastpass.com/s/document-item?language=en_US&bundleId=lastpass&topicId=LastPass/Preferences___Notifications.html&_LANG=enus
If you need anything else, let me know.
Kind Regards,
Alejandra
LastPass Tech Support