Im experiencing a lot of ping spikes, network jitter, so on and so forth. 

I usually play pubg and I'm connected to my range extender, and I experience a lot and a lot of ping spike. I use an app called netanalyzer, and my device ping to the range extender shows normal. 

I also noticed something while being logged on to my router extender page​​​​​​. It seems to show a questionmark from main router to internet. What could that possibly mean?