Devices not binding to Sonoff Zigbee 3.0 USB dongle

My RPi HA system is about a year old and has all current updates. The Sonoff Zigbee dongle had 4 temperature sensors attached andwere working until recently. There are 2 LUMI and 2 AQARA. I assumed the problem was low batteries and so replaced them. One sensor is still working (LUMI) but the others will no longer bind to the Sonoff dongle after battery change. The devices enter the bind mode with blinking LEDs, but the Dongle does not see them. Not sure how to proceed since they all were binding successfully when new. Thanks.