Hello,@Johan.E 

Router signal strength and quality plays an important role to ensure sooth live-streaming.

1. It is suggested to check if camera is receiving a good signal on the APP:
Kasa app-> Camera Device Settings-> tap name of the device ->signal strength ( tap on the Wi-Fi icon to see the value of the dBm/RSSI)
(-40d- 68dBm is good to average, less than -68dBm is relatively poor : relocate camera or router to get stronger signal)

2.  Try to ping camera IP address on the phone and share the ping test results ( if issue happens under local/ home WiFi, then ping camera under home WiFi )
> check IP cameras of camera on Kasa app (Kasa app-> Camera settings)
> download a Ping tool app like ping APP on the phone and ping camera IP for 2mins
3 .Also ensure Kasa app and camera are both up to date.

4. Try a different Wi-Fi channel on WiFi router, download WiFi analyzer app and select a less crowded channel (this will lead the smart devices disconnecting from router and  requires reinstallation)

5. try a different phone and see if issue occurs on certain phone. 
As you are experiencing sounds unusual. To address the issue and try to fix it, we would like to have a specialist look into this further via email. Please check your mailbox later, and feel free to let us know how it goes. Thank you!