You beat me to it. I have both a Conbee II and a Nortek HUSBZB, and the Nortek is much more reliable. Whether it's better hardware, or if it's the software (Home Assistant's ZHA), I don't know.
But same experience with Dresden/deCONZ. It's flaky.
Right now I have split networks while I lazily migrate devices away from deCONZ. So far every glitch I've encountered has been on the deCONZ network.
Which is a shame, because I really like the software UI. ZHA doesn't expose as much (or not as simply). But it works better, and that counts for more.
But same experience with Dresden/deCONZ. It's flaky.
Right now I have split networks while I lazily migrate devices away from deCONZ. So far every glitch I've encountered has been on the deCONZ network.
Which is a shame, because I really like the software UI. ZHA doesn't expose as much (or not as simply). But it works better, and that counts for more.