I am in automatic mode for ACF and running version 4.2.1.
In both Source view and Design view, if I paste a tag that is not allowed by ACF, the bad tag is allowed and saved. But, when the editor reloads the content, the tag is then stripped out.
My test included:
- pasting an iframe tag in Source
- pasting an img tag in design (with the image icon disabled)
In both of these cases the tag was stripped out after I reloaded the content.
So, is the behavior correct that ACF does not strip out pasted tags when saved?