I have thousands of documents just disappear from my account. They were loaded in Marketing files and attached to customers via notes and they are simply gone. Has anybody experienced that?
I have experienced this thing with blog content. I will suggest you the same strategy. You can contact the HubSpot support team. You can share the links and screenshots on the errors you are facing. Within a moment, the contact support team will try to fix the error and get your documents back.
I can see that you have opened a ticket with technical support and that the team is actively investigating this issue. They will be better able to help with this.