Documents that have anchors going to external websites (or linking to documents) without opening in a new tab will cause the iframe to attempt to load cross-domain content, which of course crashes the whole thing.
Either the links need to be sanitized or disabled to ensure they can't open in the same frame when parsing a source document.
Documents that have anchors going to external websites (or linking to documents) without opening in a new tab will cause the iframe to attempt to load cross-domain content, which of course crashes the whole thing.
Either the links need to be sanitized or disabled to ensure they can't open in the same frame when parsing a source document.