Couchbase console refuses to save large strings

Editing a document directly in the CB console web app.

Paste a large string into the document, save and then behold in terror as the string isn’t saved. Reopen the document to find it in its previous state, minus the large string.

In my case, I’m pasting a 360KB string of a base64 encoded file. Pasting works properly. Saving the document causes no error of any type. Everything looks good until re-opening the document to find NOTHING has occurred.