Hello   @Mimmo-canada 

Thank you for reaching out to the community. 

Here are some tips that may help fix the unstable issue, please give it  try. 

What should I do if my Kasa device (smart plug, smart lighting) keeps losing connection or going Offline?

If still the same, can you let us know the steps you've tried thank you. 

May I know how long do you have this device and did it works with the same Wifi router fine for a certain time period? 

What is the model of your router, and model & MAC address of the kasa smart light strip?