Hello @RebeccaB2 ,
Are you copying directly from a original source, like a master template? Or are you copying from previous copies of copies? Does the issue occur when editing a brand new email? Does the issue occur on other browsers, or in incognito / private mode? Are you able to temporarily disable any browser extensions, ad/pop-up blockers, VPNs, or other security elements that you may be running, close and re-enter your browser, and see if disabling those alleviates the issue? Does the issue occur on other devices or networks you have access to?
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