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Mapviewer Issues Following Upgrade to 12.2.1.4

I recently upgraded my OBIEE 12.2.1.3 installation to 12.2.1.4. I followed the instructions in the references noted below:
Upgrading Oracle Business Intelligence from a Previous 12c Release
OBIEE 12c: Quick Reference for Oracle Buisiness Intelligence Enterprise 12c Upgrade From 12.2.1 to 12.2.1.x (Doc ID 2153433.1)
Nowhere did it say anything special about the mapviewer component - other than the obligatory 'backup, upgrade, restore.'
When I fired up my new 12.2.1.4 installation, the mapviewer deployment was stopped. I logged into the EM console and tried starting the deployment manually only to receive a message telling me the mapviewer.ear file could not be located at /obiee12214/oracle_common/modules/oracle.mapviewer.
I went to the server and did a locate on mapviewer.ear...
/obiee12211/oracle_common/modules/oracle.mapviewer - check
/obiee12212/oracle_common/modules/oracle.mapviewer - check
/obiee12213/oracle_common/modules/oracle.mapviewer - check
/obiee12214/oracle_common/modules/oracle.mapviewer - FAIL
/obiee12214/oracle_common/modules/oracle.mapviewer.bi - check - NEW LOCATION!
This is the SECOND time we've had functionality break after an upgrade; the last had to do with the uploadrpd/downloadrpd utility.
I know asking Oracle to keep these pesky details in mind when rolling out updates is pointless so I will simply post and hope my findings help somebody.