Dear Adrian,
I tested the configuration file that you sent me for Si4467. But result is not better. However, in interrupt service routine for Rx data clock, I don't check CCA condition (clear channel assessment, it belongs to RSSI threshold in MODEM_RSSI_THRESH register. I always read Rx Data pin and decode data (check preamble, flag 0x7e, ...)). Dose it makes lost message?
Thanks Adrian!