Podcast playback speed changes on it's own.
I run and play podcast as I run. Lately as I am running the playback speed changes on its own. I first thought it was because my phone was in my sweatshirt pocket and banging around the speed was changing. I took my phone out of my pocket and was walking and watching the speed change several times on it's own. So it banging in my pocket was not the reason. I have Airpods in my ears and thought that might be the reason. So I will try with wired earphones next time.
iPhone SE, iOS 12.1