Setter of nonterminal does not work anymore when attribute of connection endpoint depends on it
a grammar (where the calculation of
B depends on value of
Root ::= A /B/ ; A ::= ; B ::= ;
and a connection specification (the receiving end may not even be necessary)
receive tree Root.A ; send tree Root.B ;
When Setting a new value for A (triggering an update of B)
Then A does not get updated. Only after the second change, the update can be seen.