I think Chrome is more insistent in trying to fetch resources. I don't know for sure, but I think it's likely that other browsers also failed, but only occasionally.
Firefox, for example, quickly gives up if it can't fetch a resource, and so would fail but then work a second time. A glitch like that could easily be overlooked as a mis-click or network error.
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So, why did it only break Chrome?
I think Chrome is more insistent in trying to fetch resources. I don't know for sure, but I think it's likely that other browsers also failed, but only occasionally.
Firefox, for example, quickly gives up if it can't fetch a resource, and so would fail but then work a second time. A glitch like that could easily be overlooked as a mis-click or network error.