Get constant connecting when already connected

[DntPullALockett]

@thehookup

Not sure why this is happening. I am using ESP8266 v 2.4.2

8 -> Attempting MQTT connection...connected
00:28:59.034 -> BOOT = false
00:29:00.033 -> Attempting MQTT connection...connected
00:29:00.033 -> BOOT = false
00:29:01.041 -> Attempting MQTT connection...connected
00:29:01.076 -> BOOT = false
00:29:02.090 -> Attempting MQTT connection...connected

When I check the logs on HASS I see this

1575179802: Client lockettLights has exceeded timeout, disconnecting.
1575179822: New connection from {{IP}} on port 1883.
1575179822: New client connected from {{IP}} as lockettLights (p2, c1, k15, u'lockett').
1575179845: Client lockettLights has exceeded timeout, disconnecting.
1575179845: New connection from {{IP}} on port 1883.
1575179845: New client connected from {{IP}} as lockettLights (p2, c1, k15, u'lockett').

When I try and turn on any of the lights for testing the toggle turns off immediately.

Any help would be great!