There are two known issues regarding vCenter HA in vSphere 6.7. VMware Engineering is aware is actively working to address these in the future.
The first issue affects some (non-critical) service startup after failover and the second issue affects patching a vCenter HA enabled system to 6.7 U2.
Currently, the first issue requires you to remove vCenter HA, perform a workaround, and re-enabled vCenter HA so my advice to you would be to remove vCenter HA before you begin your update to 6.7 U2 since you’re going to have to remove it post-update anyways.
If you’re already on 6.7 U2 with vCenter HA enabled, you’ll also need to remove vCenter HA to resolve the first issue.