Things like this happen, even to us, but there's always a long chain of failure involved. The most remarkable was the bear that climbed a fence around a military installation in northern Minnesota and almost started WW3. My understanding is that the only reason we didn't launch was that some officer in the chain of command broke protocol and shut it down, simply on the common sense observation that nothing happening at the time seemed consistent with a full nuclear launch, and shut it down while he sought outside confirmation.
https://www.military.com/off-duty/how-one-black-bear-almost-set-off-world-war-iii-during-cold-war.html