Merge issues in v8.5?

[Nicole]

We recently upgraded to v8.5 and for some reason, a job which we imported into v8.5 but was created in v8.0, is no longer working.

No record is matching (even though there are records which should match).

Just wondering if there is a known issue or change we need to make in stage for v8.5....we have analyzed the data coming from the 2 sources to make sure they are correct - unless of course we are missing something.

Thanks for any advice.

Nicole