Why is downstream light on Motorola MB8600, blinking periodically?

A few weeks ago, I guess, I noticed the blue downstream light, blinking on my MB8600 modem. I restarted it, and it stopped flashing for maybe a week or so. and then did it again. I posted something on another forum, as I couldn't log into it anymore. It was suggested to do a factory reset on it, so I could log in. So I did the factory reset, and again, it stopped flashing, for maybe a week, again.

My internet seems fine, speed tests are good, so do I just ignore it?? It hasn't done this until recently. I did notice in the event log, that are there events where it didn't record the date and time, and also it shows zero corrected or uncorrected blocks, after being online for over 9 days, which seems weird also.