This is a phenomenon that happens to supports regularly enough that I think it's worth discussing.

Regularly in the early game I'll have a crushing bot lane. In my most recent game, I was Senna with a Draven, having tons of sustain and a huge lane advantage. We get a couple plates and recall. Mid trades 1 for 1 with their lane in a bad state, so I fix the wave state mid lane before I head back bot.

In the 1.5 waves between my mid roam and coming back bot to our crushing lane, my Draven has died.

Regularly when crushing lane as a support, my AD will think it's been them the whole time and now they can just 1v2.

I guess the way to fix this is to rank up enough that your teammates are smarter, but my god is it frustrating.