Update, after a few days the alert and flashing yellow ring cleared from
all my ring protects… it was annoying to have that repeating flashing
yellow on at night in the bedrooms, but all is well after waiting it out
I have the exact same issue, happened yesterday. I was running my lawn
tractor in the garage while tuning it up, finished and closed garage.
Shortly thereafter, I got the CO alert message so I opened the garage
door and it cleared after an hour or so...