> I decided to try connecting an ethernet cable to see if the issue might be with WiFi and that has fixed the problem. I've been running the Pi 3 for over a year on WiFi so I'm not sure why its a problem now.
I started to experience the same sort of latency error "AJAX call failed (timeout: timeout)" after raising my antenna and now getting up to 300 "Total Aircraft" on the PiAware Skyview map. I too am running on Pi in wireless mode on 3.5 PiAware, and will try to switch to a hardwired Ethernet cable to see if it resolves the issue. Not sure if the source of the latency is on the WiFi network (a heavily shared resource), but my statistics on flightaware.com seem to be updating just fine. The Skyview map does update, albeit slowly, and only after a few AJAX errors are displayed.