Cascaded single input control (sql-query) not filling parameter on first change of value - Jasper Report Server v. 7.5 commercial

[Al Bundy]

Hello,

after updating Jasper Report Server 6.3 commercial to 7.5 commercial, we are encountering issues with cascading single input controls. Its even the same problem for web-service filled input control as for sql-query filled ic.

There is following ic setup for a report:

1. First not mandatory Single Input Control can alter the set of a second single input control
2. Second mandatory Single Input Control can alter the set of a third single input control
3. Third not mandatory Single Input Control is not working correctly in the end.

That is affected by the following actions:

1. User changes value of first ic
2. Mandatory Value of second ic then changes automaticaly
    -> therefor not mandatory third ic is resetting its default/last to ~NULL~ (and provides other values too)
3. User changes value of the second ic
4. User changes value of third ic from default ~NULL~ to some value
5. User hits the RUN Button

As result in the report:
the parameter provided by the third ic is NULL but it should be the user defined value from step 4

As we experimenting with value changes to the third ic from step 4 onwards, we had then this experience:

[...]
4. User changes value of third ic from default ~NULL~ to some value X
5. User changes value of third ic from X to a random other value from the set
6. User changes value of third ic back to X
7. User hits the RUN Button

As result in the report:
the parameter provided by the third ic is X.

This issue is critical to our productive environment, can anybody explain please? Is it an actionModel-Issue?

Thanks for reading.