Today i did a tempo run and the pace and distance was spot on but the audio prompts in the end of each step was completely off. 10 minutes warm up at 05:48 km the audio prompt said 10 minutes at 05:25 pace. 26 minutes at 05:08 pace and the audio said at 05:00 pace. It's the first time this happened. But the audio prompts before each step was correct, said exactly what it was supposed to do at each step. Other than that I didn't noticed anything different.
