UCD invalid or channel unusable

I am experiencing daily modem resets in the morning between around 5:40 AM and 5:50 AM. My modem (Motorola MB8600) log shows repeating Critical Errors at this exact time, specifically "CMSTATUS:US_Diplexer_Mode_Change" and "UCD invalid or channel unusable". This indicates a command or maintenance action is likely being sent from the CMTS, forcing my modem offline. Is it possible that some scheduled maintenance or a repeated daily CMTS reconfiguration is affecting my node around 5:45 AM almost every day?