Boyfriend went soft in morning

He never has issues getting hard he just looks at me and gets boners and he can go for a while, so he had morning wood and started doing the nasty but my vibrator died, I plugged it in and we started going again and he couldn’t get hard even in me or with blow job :/ kind of made me feel bad but I am not sure why this happened.. I know all about my body but not his can someone help me understand why?