Sorry.
I was seeing some stability issues in underlying Android code (the actual editor) related to "paragraph type spans", that is, styling that applies to "paragraphs" not individual characters -- and so disabled "paragraph type spans" completely, including filtering them out when pasting.
The impact was -- underlying Android code getting unhappy, and then throwing exceptions and crashing the app (not just logging a warning and proceeding anyway, as would seem more reasonable), and then the user losing everything they've typed.