Have you ever pasted raw HTML into the Source Code of a Rich Text module only to hit 'Save' and notice that it has disappeared or been truncated?
HubSpot's TinyMCE Rich Text editor strips out certain HTML tags and attributes that it doesn't support, which is why you may notice disappearing HTML. When inserting complex HTML onto a HubSpot page, we recommend that you utilize a Custom HTML module rather than a Rich Text module.
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