It seems that payslip reference ID is not reported in the general ledger transactions report.
This may or may not be related to another problem with payslips. Whenever a the
Reference field is set to Automatic, the program inserts the number 2, regardless of whether any other payslips were previously numbered or there is a higher number already existing. In this example, the three earliest paysips existed. None were initially numbered. Then, the 7/23/2018 payslip was edited to be automatically sequenced. The reference 2 appeared. Then the10/23/2018 payslip was manually edited to add the reference number 13. Then the 12/28/2018 payslip was added, with an automatic reference number. Again, the sequence number 2 was applied.
I will leave both problems in the same bugs report in case they are related.
These were two unrelated bugs. Both fixed in the latest version (19.1.1)