Aircard 785 connection problems on iPad and MacBook Air

I have a Netgear 785s and have issues that only seems to manifest under certain conditions.

MacBook Pro (Retina, 15-inch, Mid 2015)

I used 'nettop tcp -d' on the mac to monitor connections.

All Connection are 802.11N

Netgear + Macbook Pro on built in WiFi - major latency.

Netgear + Macbook Pro USB - No issues

Netgear + Airport Express -- Ethernet on Macbook - No issues

Netgear + PC (Win 7) WiFi (TP-Link TL-WN721N) - No issues.

Netgear + PC (Win 7) USB - No Issues

I also have a ZTE MF60 that connects to the WiFI on the Macbook (802.11g )with no issues.

The issue seems to be with the connection between the AirPort Extreme and the Netgear 785s radios.

Macbook WiFi hardware info

en0:
Card Type: AirPort Extreme (0x14E4, 0x152)
Firmware Version: Broadcom BCM43xx 1.0 (7.21.95.175.1a6)
MAC Address: a4:5e:60
Locale: ETSI
Country Code: AU
Supported PHY Modes: 802.11 a/b/g/n/ac
Supported Channels: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 132, 136, 140, 144, 149, 153, 157, 161, 165
Wake On Wireless: Supported
AirDrop: Supported, Channel 149
Status: Connected