Any idea why Mobile latency is more consistent on Cellular than Wi-Fi?

[reececomo]

I've been noticing that our game doesn't play so well on mobile when connected over Wi-Fi, on the other hand it plays surprisingly well over 4G cellular. Latency is more erratic/unstable over Wi-Fi than cellular.

• PC/Laptop via Ethernet: ✅
• PC/Laptop via Wi-Fi: ✅
• Mobile via Cellular: ✅
• Mobile via Wi-Fi: ❌

It could just be my router. Is there any way to set QoS/priority on the network layer, maybe?

For reference:

• Devices:
  • Wi-Fi is 5GHz ac (and 2.4Ghz)
  • Mobile device is an iPhone 11 Pro
• Game networking config on mobile:
  • Raw array buffers, unreliable, unordered
  • Sends player inputs: @ 30Hz, messages are ~20 bytes
  • Receives game state: @ 20Hz, ~100 bytes
  • There are a few reliable packets on a separate data channel, sent as JSON. Probably around 2-3 every ~10 seconds.

[reececomo]

I'm going to guess this is a probably a hardware issue? No solution so far. Get great performance on cellular.