Hello there, We use Umbraco ver. 7.12.3 on legacy website. We have the following problem which happens time to time: The "Rich text Editor" property content sometimes fully disappears after saving (I see in cmsPropertyData table in DB that its dataNtext field contains empty string for such versions). And we do not think it's due to accidental cleanup, because it happened at least for second time for last a few months. As I can see, content is always restorable, so it isn't very critical for now. But we need to know possible causes and, if it's possible to resolve this issue easy - to resolve it. Updating Umbraco isn't an option for us - as that legacy website is on support only, and soon will be switched off. So we want to fix it being on Umbraco 7 (preferrable on 7.12.3). Thanks for advise.

My first thought is that some HTML data is being cleaned up. These old editors sometimes have filters which remove / add HTML tags, it could be that too much is being removed. It could also be something like this? https://our.umbraco.com/forum/umbraco-7/using-umbraco-7/53914-Rich-text-editor-raising-the-unsafe-value-exception I suppose check the logs and ask the client what they were changing to see if there's any clues there