On Cloud Director 10.x, if you edit and save the Load balancer pool as below without any changes, health monitor gets removed.
Steps to identify the problem:
Cloud Director 10.x
This happens as per the current product behavior where the health monitor information is not returned while saving pool.
Broadcom Engineering is aware of this behavior and is working towards a fix.
Workaround:
Disable and re-enable health monitor on the pool.
Steps:
Reference documentation: Create and assign a custom health monitor
For any further queries, please reach Broadcom Technical Support via a support request. Refer : Creating and managing Broadcom support cases