CM1200 Modem Dropping Connection

Purchased the CM1200 directly from NetGear and recently the downstream channel light begins flashing.

I unplug the power cord and remove the cable feed to the modem or a combination thereof.  It eliminates the flashing for a given period and the flashing returns.

Looking at earlier reported issues, I see that there is a comment posted that asks to ensure that no coax cable line splitters in the between the modem and ISP service box.  I currrently have a coax line splitter which allows the cable line to feed to my modem.

This problem is a recent issue so why the sudden issue when the splitter has been in place for years and this modem has been inuse for months prior to the current problem with the downstream light flashing.

I upgraded to this modem because my cable provider (Spectrum) notified me that my earlier modem was only compatible with DOCSIS 3.0 and that their requirements are for DOCSIS 3.1 [my connection would fail intermittently]. 

I have had good experience with NetGear equipment and made the leap to this modem with the hopes it would resolve the DOCSIS compatibility issues, provide me with the latest technology and be steadfast & useful modem for a number of years.

Now this.