Based on user feedback and official release notes for the most recent update (version 1.8.3 as of late 2024), the following improvements have been confirmed:
Before updating, verify the current firmware: Vivax Dvb-t2 181 Software Update
After any Vivax DVB-T2 181 software update, your existing channel list may become corrupt or outdated. Always perform a fresh channel scan: Based on user feedback and official release notes