Hi you are not alone with that problem. I am having issues with the inventory as well which results in outdated inventory data shown in the web client. The fat client works fine but you are not able to manage vmx-10 vms...
Issue History:
-Inventory filled up the disk volume because it was writing 90GB of logs (xhive) on the drive -> result server crash
-Web client shows outdated data even if you create new items in the web client they will not show up
-Tried to troubleshoot this problem with VMware support for like 5 hours ->result / recommendation -> Reinstall
-Since i already had a single component (intenvory service) go wild and fill up my disk volume we set up a separate vm for each module (vCenter, sso, inventory service, webclient) -> Result same behaviour
-Uploaded logs of all modules to VMware
We tried everything you can find in KB´s... resetting the inventory database doesn´t work either 
Since we are using vCenter on a windows installation it´s not a vCenter appliance problem...
Unfortunately i am waiting now for several days to hear from support...
I can give you an update if they get back to me.
Greetings from Germany
Marcel