First of all, you guys should read and follow these best practice tips regarding avoiding interference and why you should to add many more mains-powered Zigbee Router devices (as Zigbee repeaters/extenders) as those low-hanging fruit actions will resolve the most common issues for the symtoms that you describe above → Zigbee networks: how to guide for avoiding interference + optimize using Zigbee Router devices (repeaters/extenders) to get a stable network with best possible range and coverage
That is, add several more “known good” Zigbee Router devices and other than that you also need to be aware that all Zigbee devices, and especially the Zigbee Coordinator radio adapter are extremely sensitive to electromagnetic interference (EMI, also known as RMI / Radio-Frequency Interference), as practically all sources of EMI/RMI are infamously known for sometimes leading to serious Zigbee transmission/reception loss or intermittant connection problems. Such interference can interrupt all Zigbee communication and cause dropped packages/messages on the Zigbee network, including OTA updates. Take the basic recommend actions to avoid it like adding a long USB extension cable and get the Zigbee Coordinator away from infamous know sources such as USB 3.0 devices!
Also, Nortek GoControl QuickStick Combo Model HUSBZB-1 USB Adapter is based on the very old and deprecated “Ember 3581” SoC from Silicon Labs (Silabs EM357 family Zigbee MCU/radio-chip) which is deprecated + uses outdated firmware, and can not be upgraded to latest available firmware, even if you have flashed the latest unofficial firmware released for it which is still older but at least not quite yet obsolete → GitHub - walthowd/husbzb-firmware: Nortek GoControl HUSBZB-1 / EM3581 Firmware update image
You guys really need to buy a modern Zigbee Coordinator dongle based on a much newer chip and migrate to it, (migration is super easy if → https://www.home-assistant.io/integrations/zha#to-migrate-to-a-new-zigbee-coordinator-radio-inside-zha). As such I strongly recommend buy at least new Zigbee USB adapter based on either “EFR32MG21” radio SoC from Silicon Labs or “CC2652P” radio SoC from Texas Instruments (which neither of which are cutting-edge radio SoCs/chips today but are both mature and well know to be stable).
Suggest you consider buying the official SkyConnect USB dongle if need easy of use and want to sponsor Home Assistant, or if on a budget then buy either “Sonoff ZBDongle-E” or “Sonoff ZBDongle-P” as one of those cost less than $20 and works better in every way possible + will support much newer firmware.