Your jungler is dumb. You should be pushing harder to pressure the mid to come back mid. Your jungler is making the assumption the bush he was in was not warded, which it clearly was. Even if your mid was going bot, you should still hard push mid in this situation.
Your jungler is wasting time waiting in that bush for another gank. (For the record I need to know if you're purple or blue to see how much exactly of a waste of a time this was. If you were blue team. he completely wasted his time and got himself killed. If you were purple, he only got himself killed and wasted some of his time.
On a situation like this, your jungler should know not to waste time waiting for a gank. To have improved your gameplay here, you should have informed your jungler not to waste time, or bottom lane should've said so. You should've then mentioned an option he could've done. If I perceived that mid was going back, I would've said "optimal time to get dragon. Bot injured and mid back." but these are mostly his responsibilities. On the other hand, if he was going for buff, you should have left and protected him from mid.