Latest vCentre ( 6.7 U2a ) and ESX ( 6.7) - SVEs gone wrong?

Hi all

Recently upgraded to 

Latest vCentre ( 6.7 U2a ) 

ESX - VMware ESXi 6.7, Patch Release ESXi670-201905001

SVE on 1.3.1.256 

And after about 24 hours, my Vms which have the sophos agent on grind to a halt, you can't open MS Office apps ( or any apps)  without extreme slowness ( 2 minutes to open) , if i turn off my SVEs everything works fine again

Has anyone had this before?

Support have only suggested redeploy so far which has not helped 

 

Nothing in my vCentre resources suggest an issue, nor do the SVC logs,