how to disable ACFS from starting

I have a 4-node (VMs on ESXi 6) 12.1.0.2 RAC running on RHEL 6.9. Yesterday I added a 1 TB of space to the nodes, created an ASM disk group on the space, created a volume, then an ACFS filesystem. all appears to work fine. Then someone rebooted 2 of the 4 nodes, both nodes/VMs went to "suspend" mode in VMware. From the VM console, I see it hangs with below messages until it goes to "suspend" mode:

Unknown ioctl 4712
Unknown ioctl -2146954638

I can now bring the server back up by disabling ohasd from starting, but once I start ohasd, the VM eventually hangs and goes to suspend mode. All my instances on both the VMs are down now, is there a way to disable ACFS from starting when starting the clusterware stack? I googled but couldn't find much info. Any suggestions or comments?