After my park outing, I returned to find an update to R1CBU 0.29.2. It includes fixes for: SWR Scan that leaves the radio in AM mode CAT control of modes r1cbu x6100 xiegu See also R1CBU 0.31.2 US-4361 King's Gap R1CBU 0.30.0 Firmware Update X6100 R1CBU 0.29.2 ATU Bug ATU Bug in R1CBU 2.29.2