I haven't run in a while, and I went out today to start back up. Normally, I run with the C25K app running, and Zombies, Run also running to provide me with music/audio. I've never had any issues with those two running together before.
So, today I'm doing Week 1 Day 1, and I get to the audio cue that I'm halfway done. Right after that audio cue, the music/audio from Zombies, Run stopped. I finished that run segment, and got the audio cue to begin walking. I looked at my iPhone, and it said that my iPhone needed to cool down before I could use it. I guess that is a new feature that was added in one of the recent iPhone updates. However, the audio cues for C25K kept coming as they should. I finished my last run segment, and started walking. I got the audio cue that I had one minute left. At that point, the music/audio from Zombies, Run started. I looked at my phone, and apparently it had cooled enough. About a minute later, I got an audio cue to begin running. I looked at the screen, and the C25k app showed my elapsed time as 14:00 and change. Apparently, even though the audio cues kept coming as they should while the phone was hot, the time reset back to where it was when it got hot.