yusufoozturkcoo;ling problems related to spinning fan , dusts are occupied in vents paths , also heatsink fans are not working properly
My problem was related to cooling and I still have those stuttering veeery rarely because of the poor cooling design. Your problem looks different, it may not be the cooling and the reasons could be driver or hardware issue. I suggest you to send it to technical service with your proving videos. If you didn't try, format the pc and reinstall the windows from original iso and use the drivers at Tuf A15's drivers webpage.
Update your BIOS if you haven't done it yet. For the integrated and nvidia gpu, use the Amd and Nvidia's latest drivers from their own site. Also update the chipset driver from Amd's own site. The rest is gonna be installed from the A15's own drivers page. Lastly, check the driver versions that you've installed and be sure windows update is not changing your drivers. That's all that I can suggest.