The IP address is listed among other ESET IP addresses at https://support.eset.com/en/kb332.
In case of update from a mirror pico updates are not used so it could be that the updater checks for information about new product versions.
Please carry on as follows:
Enable advanced logging under Help and support -> Technical support
Run update
Stop logging
Collect logs with ESET Log Collector and upload the generated archive here.
