Just a quick background of my environment....
Horizon 7.6
App Vol 2.14
UEM 9.14
Windows 10 Enterprise 1803
I recently upgraded to Horizon 7.6 due to compatibility issues with previous version and Win10 Ent 1803. I now have an environment that is compatible according to VMware. I am having the same old start menu and search issues that should be resolved. If i have app vol installed on the image then the start menu and search functions are broken. If I just remove App Vol and recompose the pool then it works again. It doesn't seem to be related to a writable being attached. I tested with and without. I also already added the line to disablehotplug as recommended by VMware.
Any other ideas?