Heartbeat failed for (device): MuxError

[2xsaiko]

Using this, my iPhone or iPad usually drops the connection immediately after connecting, and it completely stops connecting at all when the device is unlocked. Looks like the error is "Heartbeat failed for (device): MuxError". It happens regardless of if it's running standalone or in extension mode, and regardless of using zeroconf or not. Here's the log: https://gist.github.com/2xsaiko/5a8c7e0bb81b3dc7efdaa52ca911cccb

(In fact, the only one of these I can reliably get to work is usbmuxd. usbmuxd2 also doesn't work except for when connecting via USB for the very first time and getting the trust prompt, after reconnecting, idevicepair validate or any other libimobiledevice command gives "error: Could not connect to lockdownd, error code -8".)