The issue concerns the behaviour of Excel's RTD feature when:
- the RTD call is made from a wrapper function,
- the wrapper function is called from an array formula, and
- in one of the calculation calls, the wrapper function does not make an RTD call.
The expected behaviour is that the RTD server gets a DisconnectData call for the relevant RTD topic.
The observed behaviour is that the RTD server does not get a DisconnectData call.