Don't assume that because other devices are working that all devices have the same quality connection. WiFi and cellular signals can sometimes be weird.
  • Is your iPad connecting via WiFi or Cellular and have you checked to verify that?
  • If your iPad is cellular capable, and on WiFi, have you tried switching it to cellular to see if that works?
  • Have you run an internet speed test from your iPad and if so, what are the results?

If we knew what it was we were doing, it wouldn't be called research, would it?

— Albert Einstein