OK, interesting to know it’s related to Jetpack.
One thing I’m curious about is that you marked the I’ve deactivated all other plugins to check for a plugin conflict checkbox when you created this thread, and also confirmed the same thing in your opening post – but it seems like this issue would have been caught by following those steps.
Simply because we’re interested in improving our support experience, I just wondered if you felt we need to make those steps clearer (or was this simply an oversight)? Any feedback is appreciated 🙂