When I tried to unlock my phone by sweeping my finger on the screen, the lockscreen didn't move away to the left like it normally does but instead it returned back halfway and then went again left halfway and then came back and it did this non-stop without reacting to my finger touches.
I pressed the power button to restart phone, but the options were stuck to "take a screenshot" and I couldn't choose either restart or shutdown options. After about 5 minutes the phone started working by itself and I restarted it then. After restart the phone seems to be slower when scrolling screens or opening apps. I installed the update 41.3.A.2.24 yesterday, not sure if it has anything to do with this but I didn't have issues with my XZs until today.
I had my phone connected to my car stereo and I plugged it off from the stereo a moment before this happened. I was using the Poweramp-app to listen music from my phone through the car stereo.
