The latest version of Chrome has a bug in connection with autocorrect. The screenshot shows the Blogger textbox and the context menu (in German). I have deactivated autocorrect for all languages, but immediately after pasting the content of the clipboard, autocorrect is performed. The autocorrect underlinings go away once I enter the next character manually (not from the clipboard). I know there are some Google developers here on this platform and I thought this bug report might be useful.