tkobayas commented on PR #6430:
URL: 
https://github.com/apache/incubator-kie-drools/pull/6430#issuecomment-3205216062

   https://issues.redhat.com/browse/DROOLS-7255
   
https://github.com/kiegroup/drools/commit/e134ac6c92a529d38784e2db04016c6a0dee98b2
   
   introduced `disablePropertyReactivity()` when eval node is after join node. 
`disablePropertyReactivity()` sets `JoinNode.rightInferredMask` to `-1` (= 
`AllSetBitMask`), so 
`context.getModificationMask().intersects(getRightInferredMask())` in 
`BetaNode.modifyObject` is always true, so the execution propagates to the next 
node.
   
   The problem is that non-matching constraint is ignored as illustrated in the 
test case `testModifyEvalAfterJoinWithNonMatchingAlpha`.


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