As I understand it, you are talking about the 'live position & time'. The most likely reason is that none of the active NMEA sentences (in advanced device configuration) decoded by BT747 provides the time.
BT747 decodes GPGGA, GPRMC for live data and also GPGSV for file data.
You can activate the debug of the connection which will create a 'gpsRawDebug.txt' file in the output directory (documentation) so that the sentences sent can be examined for availability and provided data.
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