I have the exact same problem. Tested your findings to move uninstall first (before InstallInitialize) and it works as a workaround, but is not a permanent solution.I created an incident SIOC-000117301.Have you found or got any more info? (quiet in t...
HiI reported this password bug during this spring and got a job number IOB-000060489. Have requested an update of the status today.As a workaround you can call appcmd right after ISIISInstall to set the password your self, but then you have to know t...