I use the same controller and have 17 of these bulbs. They used to be flaky, then very flaky, but now they are working pretty well. Every now and then, they will no longer respond and will need to be power cycled or deleted, reset, and rediscovered. Be sure to configure the controller for software flow control, and set the Power Mode to Boost, and the Transmit Power to High. I also have the Mesh Update Period and Child Aging Timeout set to 1 day. If you leave the bulb in the inbox for a while, they will be identified as a GE Appliances ZLL Light. There were some recent fixes that really helped will this bulb, but I don’t recall if that was before 2.4 came out.
Which version of OH or the binding are you using? I’ve got OH S1512 and…
190 │ Active │ 80 │ 1.1.9 │ com.zsmartsystems.zigbee
192 │ Active │ 80 │ 1.1.9 │ com.zsmartsystems.zigbee.dongle.ember
198 │ Active │ 80 │ 2.5.0.201901280820 │ org.openhab.binding.zigbee
199 │ Active │ 80 │ 2.5.0.201901280820 │ org.openhab.binding.zigbee.ember