I am running HA with Conbee II using zigbee2mqtt in docker, and it is very stable and easy to use. However the Conbee II stick needs to left at an older version of firmware. The most recent updates of Conbee II firmware are unstable.

"Warning: Conbee 2 firmware versions newer than 0x26580700 will result in an unstable network with devices dropping randomly, see Issue 9554" https://www.zigbee2mqtt.io/guide/adapters/deconz.html