Bob,
version 1.1.4 from February 2022 is more than three years old and Xiegu made many changes to it (both in the GUI application and in the baseband firmware) that I am not at all surprised it doesn't work with R1CBU/R2RFE custom firmware.
?
If I were you, I would first upgrade both app and base to the latest release from Xiegu, make sure your radio is able to receive and transmit with Xiegu's release (if it doesn't, then you know for sure it is a Xiegu's software/hardware problem), repeat that test a few times, and once you feel comfortable, upgrade the app part to R1CBU/R2RFE.
?
73,
Franco K4VZ
