There may not be any impact to the ESXi hosts.
VMware NSX-T 3.2.x
"100% Configuration Complete" means the ESXi host has received the configuration from the NSX management plane and completed the final process of host preparation. However, the ESXi host failed to notify the NSX manager that it is completed, thus the UI is stuck at "100% Configuration Complete".
To resolve this issue, cycle the problem ESXi hosts into NSX maintenance mode and then out of the NSX maintenance mode. This will trigger the resync between the ESXi host and management plane, thus completes the status.
NSX maintenance mode for prepared hosts can be found under:
System, Fabric, Hosts, select the host, Action, Enter NSX maintenance mode/Exit NSX maintenance mode