I temporarily lost part of hearing, too. Happend to me after casually biking in a fasted state after attempting a short but steep climb. When I was at the top,

I temporarily lost part of hearing, too. Happend to me after casually biking in a fasted state after attempting a short but steep climb. When I was at the top, I made a break just to start getting into this bonk state rather slowly over the next approximately 5 minutes. I was still standing all the time not becoming unconscious. I thought of having a stroke or something. Scariest moment of my life so far.