OEM 13c – Unable to find agent in a patch plan

If you have an issue  to find an agent using a patch plan from OEM 13c, then you are likely facing a bug.
Oracle explains the rationale in the MOS Id 2240307.1.
You need to apply patch 25604219 in order to fix this issue. After this you can search your agent and add it to the patch plan.
Thanks,
Alfredo