ERROR (MainThread) [homeassistant.components.mqtt] Timed out

I’m getting thousands and thousands of errors in my log stating:
ERROR (MainThread) [homeassistant.components.mqtt] Timed out
I’ve tried disabling the broker connection in Integrations and removing the broker in the supervisor, but as soon as I re-initialise the connection to the broker, the log goes crazy.
The MQTT integration is working but the excessive log writing is slowing my system down.
Running all the latest versions on a Pi4.
Can anyone help please?