first things to look at is if the tuner is uninstalling the Adobe package. If the initial install was done using Policy service then check if someone removed the channel from the policy. If that be the case then the tuner would uninstall the Adobe package..check if the marimba.subscription.nodelete property is set to true:
specifies whether packages are deleted. By default, packages are deleted
when a user or machine is removed from a group in the underlying
directory server. If you set this property to true, packages are not deleted
even if you delete packages from targets using the Target Details page.
Packages remain on the targets and are no longer managed using Policy
Valid value: true or false
Default value: false
If you still not able to find the problem post the current config.xml and tuners properties and prefs.txt along with the policy service channel history logs and tuner history logs from an endpoint.
Yes, it would be the case that Install policy has been assigned instead of install-persist. You can check the primary state of the package in the policy manager and confirm that.
Changing the policy the install-persist might help.
Thanks for the info..it worked..