Since the silent failure to save updates looks like it only happens on the initial connect, perhaps it would be simple to 'just' invoke the existing "WARNING: You are no longer connected to the server" if the initial websocket connect times out?
(My wife says that 'just' means, "I'm going to say this without actually thinking about the details.) -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/a3132f51-b767-4b87-8fc3-ecc2e2166f11%40googlegroups.com.

