Hi,
I just upgraded to 1803 using 2.9e miner version. The miner now gets stuck at:

It stays there for at least 1,5 hours till now.
Looking forward to your help!
Few posts back I have reported the same problem and issued a warning. In my instance compute mode was off after upgrade, and miner took some 5 or so minutes to find all gpus before starting mining.
Two options: roll back the upgrade.
Or clean install the Radeon drivers (Uninstall with ddu, install driver, enable compute mode) then try PH.
Report your findings.