The parity bit you configure as default value for a specific ARINC label within the HW config file, e.g.:
<bti:message ID="304" name="label 204" messageBufferIDRef="1204" labelDecimal="204" SDI="00" monitor="true">
<bti:messageBuffers>
<bti:messageBuffer ID="1204" name="True Heading">
<bti:rawData>000001CD</bti:rawData>
</bti:messageBuffer>
</bti:messageBuffers>
</bti:message>
is NOT overwritten by the correct parity bit, as opposed to the SDI and ARINC label bits. Parity errors are NOT enabled. The correct ARINC message would be 0x200000CC (parity=odd).
The ARINC log file lists: 0x000000CC, so SDI and label got correctly overwriten. However, parity bit was not.
Custom Device Release Version 21.3.0.6.