Error: Invalid primitive date object

[Kaiserchen85]

When requesting a ReadPropertyMultiple on AnalogInput, there was a chain of errors that were outputted in the console. We were expecting a date to be seen for Proprietary Property 512 + 4, however, Proprietary Property 512 + 4 was not listed amongst the list of properties in the object.

The full error is in this file:
NodeJS AI error.txt

I am using this version of the BACnetServerExample: c5b3f85