As a web developer, I sometimes have a field in a form (e.g. inside a CMS) where it makes no sense for 1Password to pop up.
So, to prevent 1password browser extension from showing the 1Password icon on a form field, simply add this attribute:
<input type="email" id="email" name="email" autocapitalize="none" autocorrect="off" spellcheck="false" required placeholder="Enter your email address..." >
source: 1password's (angry) forum.