Are you running the most up-to-date version of the Pik app? It should be 1.5.1. If you are up to date, I'd suggest force-quitting the app (double click the remote touchpad and swipe up on the Pik app), and if this doesn't resolve it, uninstall and re-install the Pik app. I'd also recommend hard-wiring the Apple TV with ethernet if possible - sometimes WiFi is the culprit.
I have the same issue. Using Pik TV app (1.5.1) on my Apple TV and the app periodically freezes (image freezes audio keeps going), after a few seconds the video runs in fast-forward until it catches up and then it works fine for a some time until it freezes again.
I deleted and re-installed the app, restarted my router, restarted Apple TV. My Apple TV is connected via Wifi, but that can't be the problem since I'm able to watch Netflix 4K just fine.
It all started after my Apple TV updated the Pik TV app. I've been using Pik TV for 1 year now and never had these kind of issues.
Any help is appreciated.
Sorry to hear that you're still experiencing the issue. Is it happening on live TV as well as On Demand, and if live, is it across all channels? Does it appear only on start-up or in the middle of watching? For what it's worth, I'm not trying to blame the Wifi, just suggesting common troubleshooting steps. The Pik app is working fine on my Apple TV 4K and on those of colleagues I've spoken to. I'm on the latest app version and hardwiredto ethernet so I thought I'd start there. Obvisously it's not working for everyone. If you've force-closed the app, logged out and back in, un-installed and re-installed, rebooted the box (unplug and plug it back in) etc., then your best bet it to call in for live troubleshooting with tech support. Seems like you've done that and they're sending a new unit.