Alert Composer: getting the following exception at runtime oracle.jbo.JboException: JBO-29000: Unexp

Summary

Alert Composer: getting the following exception at runtime oracle.jbo.JboException: JBO-29000: Unexpected exception caught: java.lang.StackOverflowError, msg=null

Content

Hi experts,

We are suffering from the unstable behavior of Alert Composer.
We have developed templates in the DEV instance and trying to paste those in TEST/PROD.
Most of the time we are getting JBO-29000: Unexpected exception caught: java.lang.StackOverflowError, msg=null

Does anybody face the same?
We are stuck and don't understand how to handle this. 
It looks like a floating/caching/etc issue as at some point we managed to make a couple of alerts work in TEST but cannot update them in PROD.