Enduro 3 - issues - backlight, Hitt and treadmill

I have been using the Enduro 3 for almost a week now. Everything about it seems perfect. But, I have couple of issue on the watch I don't know if it is a software issue or malfunction from the watch itself. I'll specify some of the issue that I have encountered so far:
1. Backlight: even though I set it on, when I'm exploring the watch pressing the buttons and so on, the light turns off. Is this normal?
2. HIIT -AMRAP: when I select the time, it doesn't give the time that I select, but rather the previous time set. For example, I set the time to 10 minutes and hit start, it doesn't count down from 10 minutes, but rather from the previous time selected- assuming previous HIIT workout I selected 7 minutes, then it starts the count down from that.
I have to select the time that I want for 2-3 times before it finally gets it. Is this a software issue? Does anyone have the same issue?
3. Treadmill: when I start treadmill it doesn't start the distance nor heart rate zone. I have to cancel it and do it again till I noticed it starts calculating the distance, similarly for the ebike. Again, anyone have the same issue?

Are these software issue or watch malfunction?