I've seen in previous patch readme's that if you upgrade epo, you have to re-apply the patch. Not sure that is the case here, but I suspect it is.
Upgrades to newer patch versions do not preserve hotfixes applied in the interim. In most cases, these hotfixes are included in the patch, but due to the timing of this hotfix, it would have been impossible to incorporate without significantly delaying the release schedule. As noted, you must re-apply the patch after upgrading to EPO 5.1.2, and hotfix 1052048 was tested with 5.1.2 in mind, it just could not meet the testing requirements for a full patch release versus a hotfix.
ePolicy Orchestrator 5.1.1 Hotfix 1063194. Updates Java to v1.7_u80. Use this hotfix for ePO 5.1.1, 5.1.2, and 5.3.0