I have previously recommended the use of this MHCOZY relay that is available in the following form-factors:
I have been using a few of these, starting with a single channel relay about 20 months ago.
Two or three months ago, the single-channel relay started misbehaving in momentary mode. When flipped to on, they relay would turn itself off within a second (as anticipated), but then flip rapidly between on/off about 4-10 times (variable number of on/off repeats). This behavior didn't change when I reset and re-paired the relay, so I stopped using it.
Today, the dual channel relay started behaving in exactly the same way. I'm not using that relay with Hubitat, so whatever the issue is, it is unlikely to have been caused by a Hubitat platform or zigbee update.
Bottom line - I don't recommend them anymore.