I am seeing some inconsistencies in using JDBC Driver in that it seems that
sometimes it appears you need to provide an "OLD_VALUE" in either a Type 2
or a Type 3 event.

I see mixed results in IDM 3.5.1 and IDM 3.6.

Am I seeing things I should not see?

The documentation is not clear on whether or not you actually need to
provide an OLD_VALUE.