Walk mode switched to a Run mode

Hello, I have experienced this glitch on FR965. I selected Walk activity, confirmed and “Today’s suggestion” for a run appeared on screen. I dismissed it with the Back button, but the activity switched to a Run. I didn’t notice and started the activity as a Run. What’s worse, I still cannot start a walk, because it always suggests me a run and if I go back, it always switches to run.

Thanks for your help!