Need help with antminer!

I’m hoping someone can help me out here
Bought a used antminer l3+
After a week of running flawlessly
the cgminer log
Says “Internet connection error” after a few minutes

I hardwired it right to my router no change

It’s running vnish 3.8.8

Hoping someone can help me out!!

I changed many settings can’t understand the root of the problem

Dumped the firmware for blissz

Seems stable now for about 45 mins