First, I would encourage you to read the following:
Second, it may help us diagnose the issue if you could provide information about your system and the devices in question.
- What kind of computer are you using for your HA server? A RaspbeeryPi, Home Assistant Green, old laptop, etc.
- Is the dongle connected directly or with an USB extension cord. Which type of USB port is it connected to?
- Which install method are you using for your Home Assistant instance?
- Have the different dongles/hugs shown up in ZHA?
- Is the dongle/hub located in the same room as the sensors?
- Do you have any Zigbee router devices like lightbulbs, smartplugs, or switches?