What computer/appliance are you running Home Assistant on and how exactly are you physically connecting the Home Assistant SkyConnect dongle to it? Using USB extender cable to a USB 2.0 port?
Anyway. be aware that there are many known issues with Aqara/Xiaomi devices, like for example them having issues when the battery is running low on power and problems communicating through other brands of Zigbee Router devices, and most those apply to all Zigbee gateway implementations that are not the official Aqara/Xiaomi hubs, see → https://community.hubitat.com/t/xiaomi-aqara-devices-pairing-keeping-them-connected/623
Regardless, before you take further actions to troubleshoot any Zigbee issue, make sure you done your best to avoid EMF/EMI/RMI interference by reading and following this → Guide for Zigbee interference avoidance and network range/coverage optimization
Tip is to add a few “known good” Zigbee Router devices and then re-pair/re-join the Aqara/Xiaomi devices so they will connect through those. Personally, I recommend buying a few IKEA TRÅDFRI Signal Repeater and Aeotec Range Extender Zi. As one of the problems with Aqara/Xiaomi devices is that they will not automatically move to a closer Zigbee Router device if it added later you must manually re-pair/re-join the Aqara/Xiaomi device after to make sure it connects through the newly added Zigbee Router device. Again see this for even better suggestions and more recommendations → Guide for Zigbee interference avoidance and network range/coverage optimization
You also need to be aware Zigbee is extremely sensitive to EMF/EMI/RMI and the two most infamous sources of interference comes from Wi-Fi radios and USB 3.x ports/devices/cables so make sure you are connecting the Zigbee Coordinator via long USB extension cable and connect it to a USB 2.0 port and not a USB 3.x or USB 4.x port (so connect it via a powered USB 2.0 hub if your computer/appliance that runs Home Assistant only have USB 3.x ports).
It is quite common that a compatible Zigbee devices will not properly communicate, with corrupt mesages being dropped and sometimes not even being able to pair/join due to EMF/EMI/RMI interference.