Probably interference in a “noisy” environment where the signal does not always come through. My guess is also that you have it connected to a USB 3.0 port which is known to cause EMF interference.
Regardless of the actual root cause, always aim to keep the firmware of the Zigbee Coordinator adapter updated and more products acting as Zigbee Router devices, however most important is to prioritize taking preemptive actions to implement workarounds in order to avoid all sources of EMF/EMI/RFI interference which can commonly cause real problems for a Zigbee Coordinator. Read:
https://github.com/home-assistant/home-assistant.io/pull/18864
and
Understand and remember that Zigbee signals are really weak so rely on a strong Zigbee network mesh (meaning many Zigbee Router devices) as all Zigbee devices and especially the Zigbee Coordinator are very sensitive to EMF/EMI/RMI interference so will make it much easier to troubleshoot and find the real root cause if have already optimized your setup and environment to workaround such potential issues.
If have some interference and a so-called “noisy environment” then Zigbee Coordinator and Zigbee devices will have to retransmit their messages over and over again, spamming the Zigbee network.
Start by getting a long USB extension cable for the Zigbee Coordinator adapter and connect it to a USB 2.0 port (or via a powered USB 2.0 hub if only got USB 3.0 ports as those cause interference).
Also if you have not already then upgrade to latest Zigbee Coordinator firmware on the adapter, read: