Intermittent outages - RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DR

We have had reliable internet service until recently.  We are experiencing intermittent outages and it appears from the cable modem logs it must be restarting.   I looked at the log file, and the messages show Dynamic Range Window Violation and RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW

Anybody know what this means?  Log files and power levels are shown below.