This past few days, i keep on receiving the “Connection lost. Saving has been disabled until you’re reconnected. We’re backing up this post in your browser, just in case.” error when publishing post or saving draft. I tried deactivating all my plugins, updating and changing my current theme, downgrading wordpress and everything but the error still occurs.
Just this morning, i read a forum that has the same problem as mine. To resolve the Connection Lost issue, he disabled the Object Cache of W3 Total Cache. I tried that and it works!
But since i don’t want to disable the Object Cache of W3 Total Cache Plugin, i tried exploring it and check each option and i found out that instead of disabling the Object cache, just enable the caching of wp-admin requests while Object Cache is still enabled.
Now, the error is gone! Try it and let me know if it doesn’t work.