EBS 12.2.4: Forms server crashes after JVM heap size change

Either needing to upgrade from 11.5.10, 12.1, or a lower version of 12.2, you need to be aware of what I found in MOS note "Forms Server Fails With "Could not reserve enough space for object heap" Changing JVM Heap Size To 2G In 12.2.4" from document ID 2014509.1 because increasing heap size here can actually cause you problems instead of resolving them!